client.Broadcasts
Every method in this namespace: its signature, its parameters, what it returns and an example.
Methods
One message sent to everybody in one or more audiences, a personalised copy for each person, with unsubscribe handled for you.
Broadcasts.Preview
Count who a broadcast to some audiences would reach
Preview(ctx context.Context, body nextmail.Body, opts ...nextmail.RequestOption) (nextmail.Object, error)Returns the numbers Send would work from, without sending or writing anything: recipients, the people a broadcast to these audiences would reach now, unsubscribed, the contacts skipped because they have unsubscribed, and suppressed, the subscribed contacts skipped because their address is on the suppression list. A contact in several of the audiences counts once.
The count is taken at the moment of the call, so contacts who join or leave before a send change it. Only audienceIds, excludeAudienceIds and segmentId are sent, so you can pass the same object you are about to give Send.
Parameters
audienceIds[]stringRequired1 to 10 audience ids. One that names no audience in the workspace is a 404
audience_not_found, and All contacts, which no broadcast can go to, is a 422audience_is_everyone.excludeAudienceIds[]stringUp to 10 audiences whose members are left out of the count, as
Sendleaves them out.segmentIdstringA saved segment that narrows the count to the contacts that match it, as
Sendnarrows the broadcast.nextmail.WithAPIKeystringOverrides the client's API key for this call only.
Returns
An nextmail.Object with audienceIds as sent, recipients, unsubscribed and suppressed.
Example
reach, err := client.Broadcasts.Preview(ctx, nextmail.Body{ "audienceIds": []string{"aud_5b1f9c3e7a2d4068c9e1f3a7"},})if err != nil { return err} fmt.Println(reach.Int("recipients"), reach.Int("unsubscribed"), reach.Int("suppressed"))Notes
Needs only
audiences:read, so a key that cannot send can still show somebody the count.The SDK retries it after a network failure or a retryable status, since it changes nothing.
Also available in
Broadcasts.Send
Send one message to everybody in one or more audiences
Send(ctx context.Context, body nextmail.Body, opts ...nextmail.RequestOption) (nextmail.Object, error)Creates a broadcast: one message sent to every contact in the audiences you name, as a separate copy for each person. Every copy has exactly one recipient and no cc or bcc, so nobody sees who else it went to, and every copy is an ordinary email with its own msg_ id, events, tracking and webhooks. emails.list({ broadcastId }) lists them. Copies are not filed in the Sent folder, because the broadcast is the record.
The call returns straight away with the broadcast queued, or scheduled when you pass scheduledAt, and the sending happens in the background, 50 people at a time. Poll Get to follow status and counts as it goes.
Who gets it: every contact in at least one of audienceIds, counted once however many of them hold it, except a person who has unsubscribed and an address on the suppression list. audienceIds cannot name All contacts, the built-in audience of everyone the workspace has written to, because most of them never asked for its mail: that is a 422 audience_is_everyone. A contact added to one of the audiences after this call but before the sending reaches it is included. counts.recipients is the estimate taken at the call, and Preview returns the same count without sending.
subject, html and text take merge fields, filled in from each contact: {{firstName}}, {{lastName}}, {{name}}, {{email}} and {{unsubscribeUrl}}. Each takes a fallback after a bar, so {{firstName|there}} reads there for a contact with no name. The first name is the first word of the contact's name and the last name is the rest. A custom field of the contact is {{attributes.<key>}}, such as {{attributes.plan|Free}}, and reads as its fallback, or as nothing, when the contact has no such field. Values are escaped in html, and any other {{…}} is left as written. With template, those five values are passed as props, but only the ones the template declares, except unsubscribeUrl, which every template receives.
Every copy carries the one-click unsubscribe headers mail clients and the large mailbox providers look for. A body or a template that does not place {{unsubscribeUrl}} itself gets a short footer with the link, in English, which also names the sender and shows the postal address once marketingPostalAddress is set through Settings.Update. Following the link unsubscribes the person from all of the workspace's marketing mail: every audience they are in shows unsubscribedAt, Suppressions.ListUnsubscribes lists them, and later broadcasts and automation emails skip them, even after they are added to an audience again. Their contact and mail sent to them one message at a time are not affected.
The whole send is checked against the plan's monthly sends before anything is written. A broadcast the allowance cannot cover fails with 429 send_quota_exceeded and leaves nothing behind, and each copy counts as one send.
Parameters
audienceIds[]stringRequired1 to 10 audience ids such as
aud_9f2c4b7e1a0d63d84c5f2e7b. A contact in several of them gets one copy. An id that names no audience in the workspace is a 404audience_not_foundand All contacts is a 422audience_is_everyone, and either way nothing is sent.fromanyRequiredSender as
[email protected],Acme <[email protected]>or a map withemailandname. It must be an address the key may send as, otherwise 403from_address_forbidden.replyToanyWhere replies go, the same for every copy.
subjectstringRequired unless a template supplies it, at most 998 characters. Takes merge fields.
htmlstringHTML body, at most 1,000,000 characters, with merge fields. Without
{{unsubscribeUrl}}in it an unsubscribe footer is added.textstringPlain text body, at most 1,000,000 characters, with merge fields. Without
{{unsubscribeUrl}}in it an unsubscribe line is added.templatenextmail.BodyA stored template instead of
htmlandtext, never beside them. The merge values reach it as props it declares, such asfirstNameandunsubscribeUrl.trackingnextmail.BodyOpen and link tracking for every copy. A field left out follows the address it is sent from when that address set it, and is on otherwise.
tagsnextmail.BodyUp to 8 tags, keys of 1 to 64 letters, digits,
_or-, values up to 256 characters. Every copy carries them, plusbroadcast_id, which the server adds.excludeAudienceIds[]stringUp to 10 audiences whose members are left out, even when they are in one of
audienceIds, such as the customers who already bought. All contacts may be named here.segmentIdstringA saved segment, from
Segments.Create, that narrows the audiences: only the contacts that match its conditions get a copy. Its conditions are read when the broadcast is sent or scheduled and kept with it. An id that names no segment is a 404segment_not_found.utmnextmail.BodyCampaign tags added to every http and https link in the body, with
source,medium,campaign,termandcontent, sent asutm_sourceand the rest. A link that already carries one keeps its own, and the unsubscribe link never gets them.abTestnextmail.BodyAn A/B test, with
variants, 2 to 4 maps that each replace thesubject, or thehtmland ortext, of the broadcast, so an empty one keeps it,testPercent(5 to 50, 20 unless set), the share of people that get a variant,metric,opensorclicks, which picks the winner, andwaitMinutes(30 to 4320, 240 unless set) before it is picked. Everybody else then gets the winning variant, and a template broadcast can only vary the subject.scheduledAttime.Time | stringA
time.Time, an ISO 8601 instant or a duration such asPT2HorP1D, in the future and at most 365 days out. Left out, the sending starts straight away.nextmail.WithIdempotencyKeystringYour own key, 1 to 255 characters of letters, digits,
_,.,:or-. Left out, the SDK makes one for the call, so its own retries never send twice. Sending the same key again answers with the broadcast it created instead of a new one; the same key with a different body is a 422idempotency_key_reuse.nextmail.WithAPIKeystringSends with this key instead of the client's.
Returns
An nextmail.Object, a broadcast object plus replayed, with id (brd_ plus 24 hex), status queued or scheduled, audienceIds, from, subject, scheduledAt, createdAt and counts, whose recipients is the estimate and whose other counts start at 0.
Example
broadcast, err := client.Broadcasts.Send(ctx, nextmail.Body{ "audienceIds": []string{"aud_4c1b8e2a7d9f05c36b4e8a71"}, "from": "Acme <[email protected]>", "subject": "{{firstName|Hello}}, the September release is out", "html": "<p>Hi {{firstName|there}},</p><p>Here is what changed this month.</p><p><a href=\"{{unsubscribeUrl}}\">Unsubscribe</a></p>", "text": "Hi {{firstName|there}},\n\nHere is what changed this month.\n\nUnsubscribe: {{unsubscribeUrl}}", "tags": nextmail.Body{"campaign": "release-2026-09"}, "scheduledAt": "PT2H",})if err != nil { return err} fmt.Println(broadcast.String("id"), broadcast.String("status"), broadcast.Bool("replayed"), broadcast.Object("counts").Int("recipients"))Notes
Safe to retry. Every call carries an
Idempotency-Key, yours or one the SDK makes, so a retry after a network failure answers with the broadcast the first attempt created, withreplayed: true, instead of sending again. Keys are scoped to the API key or app that sent them. Reusing a key with a different body is a 422idempotency_key_reuse.Refusals: 422
no_recipientswhen the audiences are empty or everybody in them has unsubscribed or is suppressed, 422audience_is_everyonewhen one of them is All contacts, 409domain_not_sendablewhen thefromdomain cannot sign mail yet, 422 ontemplate.*when the template does not resolve.No attachments, cc, bcc, translation or encryption. A body from
htmlortextand atemplatetogether are refused.A test key (
oe_test_) creates a broadcast whose copies are marked sent and delivered to nobody, like any test send.
Also available in
Broadcasts.List
List one page of broadcasts, newest first
List(ctx context.Context, opts ...nextmail.RequestOption) (*nextmail.Page, error)Returns one page of the broadcasts in the workspace, newest first, each with live counts. audienceId keeps the ones that were sent to that audience, alone or beside others.
Paging is keyset: nextmail.WithLimit takes 1 to 100 and defaults to 25, and NextCursor, the id of the last broadcast on the page, goes back as nextmail.WithCursor while HasMore is true. Send the same audienceId with every page. ListAll and Iterate do that walk for you.
The individual messages are not here. List the copies of one broadcast with emails.list({ broadcastId }).
Parameters
nextmail.WithAudienceIDstringOnly the broadcasts that included this audience. An id that names no audience answers an empty page.
nextmail.WithLimitintRows per page, a whole number from 1 to 100. The server defaults to 25.
nextmail.WithCursorstringThe
NextCursorfrom the previous page, a broadcast id. One that names no broadcast in the workspace is a 400invalid_cursor.nextmail.WithAPIKeystringOverrides the client's API key for this call only.
Returns
A *nextmail.Page with Items, HasMore and NextCursor. Each item has id, status, audienceIds, from, subject, counts and the timestamps.
Example
page, err := client.Broadcasts.List(ctx, nextmail.WithAudienceID("aud_4c1b8e2a7d9f05c36b4e8a71"), nextmail.WithLimit(10))if err != nil { return err} for _, broadcast := range page.Items { fmt.Println(broadcast.String("createdAt"), broadcast.String("subject"), broadcast.String("status"), broadcast.Object("counts").Int("sent"))} fmt.Println(page.HasMore, page.NextCursor)Notes
A key limited to particular addresses or domains lists only the broadcasts sent from an address or domain it holds.
Also available in
Broadcasts.ListAll
Collect every broadcast into one slice
ListAll(ctx context.Context, opts ...nextmail.RequestOption) ([]nextmail.Object, error)Follows NextCursor from page to page and returns with every broadcast in the workspace, newest first, or every one sent to audienceId when you pass it. limit sets the page size of each request, not the total.
Parameters
nextmail.WithAudienceIDstringOnly the broadcasts that included this audience.
nextmail.WithLimitintPage size per request, from 1 to 100, defaulting to 25 on the server.
nextmail.WithCursorstringA broadcast id to start after.
nextmail.WithAPIKeystringOverrides the client's API key for every page of this walk.
Returns
A []nextmail.Object holding every broadcast across all pages.
Example
broadcasts, err := client.Broadcasts.ListAll(ctx, nextmail.WithLimit(100))if err != nil { return err} for _, broadcast := range broadcasts { fmt.Println(broadcast.Object("counts").Int("sent"))}Notes
A failure on any page fails the whole call.
Every row carries live counts, so collecting a long history reads the copies of every broadcast in it. Use
Iterateto stop early.A key limited to particular addresses or domains lists only the broadcasts sent from an address or domain it holds.
Also available in
Broadcasts.Iterate
Stream broadcasts one at a time, newest first
Iterate(ctx context.Context, opts ...nextmail.RequestOption) *nextmail.IteratorReturns an iterator that yields broadcasts individually, newest first, and requests the next page only once the current one is drained. Breaking out of the loop stops the requests, so this is the cheap way to find the latest broadcast that matches something the filters cannot express.
Parameters
nextmail.WithAudienceIDstringOnly the broadcasts that included this audience.
nextmail.WithLimitintPage size per request, from 1 to 100, defaulting to 25 on the server.
nextmail.WithCursorstringA broadcast id to start after.
nextmail.WithAPIKeystringOverrides the client's API key for every page of this walk.
Returns
An *nextmail.Iterator yielding one broadcast per step.
Example
for broadcast, err := range client.Broadcasts.Iterate(ctx).All() { if err != nil { return err } fmt.Println(broadcast.String("status"), broadcast.String("id"), broadcast.Object("counts").Int("queued"))}Notes
The iterator is lazy, so an abandoned loop costs only the pages you consumed.
A key limited to particular addresses or domains lists only the broadcasts sent from an address or domain it holds.
Also available in
Broadcasts.Get
Read one broadcast and how far it has got
Get(ctx context.Context, id string, opts ...nextmail.RequestOption) (nextmail.Object, error)Returns one broadcast with counts read live from its copies, which makes this the call to poll while it sends.
status moves from scheduled or queued to sending and settles on sent once every copy handed over has gone out or failed. It reads sending for as long as copies are still waiting, even after the last person was reached and completedAt was set. cancelled and failed are the other two ends, and on failed lastError says why: the from address can no longer be sent from, the template stopped resolving, the plan ran out part way, the sending itself kept failing, or not one copy could be written.
counts.recipients is the estimate taken when it was created. created is the copies written, one per person reached, skipped the people passed over because their address was suppressed by then, and failedToQueue the people whose copy could not be written. queued, sending, sent, failed and cancelled count the copies by the state each one is in now.
Parameters
idstringRequiredA
brd_id fromSendorList.nextmail.WithAPIKeystringOverrides the client's API key for this call only.
Returns
An nextmail.Object with id, status, mode, source, audienceIds, from, subject, counts, lastError, scheduledAt, startedAt, completedAt, cancelledAt, createdAt and updatedAt.
Example
broadcast, err := client.Broadcasts.Get(ctx, "brd_5a8c1e3f7b2d94a06c8e1f3b")if err != nil { return err} fmt.Println(broadcast.String("status"), broadcast.String("id"), broadcast.Object("counts").Int("sent"), broadcast.Object("counts").Int("recipients"))Notes
A missing broadcast fails with an
*nextmail.Errorthat matchesnextmail.ErrNotFoundand codebroadcast_not_found. An id from another workspace is a 404 too.For who each copy went to and what happened to it, use
ListRecipients,GetRecipientreads one copy with its content, andStatssums it up.A key limited to particular addresses or domains reads only broadcasts sent from an address or domain it holds. Any other id fails with
broadcast_not_found, as if the broadcast did not exist.
Also available in
Broadcasts.Stats
Read how a broadcast performed
Stats(ctx context.Context, id string, opts ...nextmail.RequestOption) (nextmail.Object, error)Returns the totals and a series for one broadcast. totals counts copies sent, delivered, bounced, complained (reported as spam) and failed, pending for the ones still waiting, and people who opened, clicked and unsubscribed, with opens and clicks as event counts. series is sparse and oldest first: one bucket per grain in which something happened, counting each person once at the first time it happened to them, so it adds up to the totals.
Pass days or minutes to also read what happened lately. window then counts the copies delivered, bounced, reported as spam, opened, clicked and unsubscribed inside it, and series keeps only its buckets, while totals still covers the whole broadcast. Without either, window is null.
Parameters
idstringRequiredA
brd_id fromSendorList.nextmail.WithGrainstringBucket width:
minute,hourorday, defaulting tohour.nextmail.WithOffsetMinutesintMinutes east of UTC to cut the buckets in, from -840 to 840. For the local zone, pass the offset
time.Now().Zone()reports, divided by 60.nextmail.WithDaysintReads a window of this many days too, from 1 to 1095. It starts at the beginning of its first
grainbucket and ends now.nextmail.WithMinutesintThe window in minutes, from 1 to 1576800, which wins over
dayswhen both are sent.nextmail.WithAPIKeystringOverrides the client API key for this call only.
Returns
An nextmail.Object with broadcastId, grain, totals, window and series, each bucket a map with bucket, delivered, opened, clicked and unsubscribed. window is a map with since, delivered, bounced, complained, opened, clicked and unsubscribed, or null when no window was asked for. links lists the links clicked most, clients the mail clients and countries the countries people opened it from, and abTest how each variant of an A/B test did and which one won, or null without a test.
Example
stats, err := client.Broadcasts.Stats(ctx, "brd_5a8c1e3f7b2d94a06c8e1f3b", nextmail.WithGrain("day"))if err != nil { return err} fmt.Println(stats.Object("totals").Int("sent"), stats.Object("totals").Int("opened"))Notes
Read only, so the SDK retries it after a network failure like any other read.
A key limited to particular addresses or domains reads only broadcasts sent from an address or domain it holds. Any other id fails with
broadcast_not_found, as if the broadcast did not exist.
Also available in
Broadcasts.Analytics
Read how broadcasts did over a time window
Analytics(ctx context.Context, opts ...nextmail.RequestOption) (nextmail.Object, error)Returns the numbers behind the Analytics tab of the Broadcasts page in one request: how the live broadcasts sent inside a window did, added up in totals and cut to grain in series, and one row per broadcast in broadcasts so they can be compared.
A copy counts when it was sent inside the window, and everything that happened to it afterwards counts with it, so an open today of a copy sent last week is in a 30 day window but not in a 1 day one. Test mode broadcasts are left out. totals and series add up the broadcasts named in broadcastIds, or every one when it is left out, while broadcasts always lists every broadcast in the window, newest first.
series is sparse and oldest first: a bucket in which nothing happened has no entry, so a chart must fill the gaps. It counts each person once, at the first time it happened to them. grain sets the bucket width and the key shape, YYYY-MM-DD, YYYY-MM-DDTHH or YYYY-MM-DDTHH:MM, and offsetMinutes shifts the boundaries so days break where the reader's day does. The window starts at the beginning of its oldest bucket, reported as since, and ends now, reported as until.
Parameters
nextmail.WithBroadcastIDs...stringUp to 50 broadcast ids for
totalsandseriesto add up, sent comma separated. Leave it out, or pass an empty array, for every broadcast in the window. An id with no copy in the window adds nothing, and more than 50 is a 422.nextmail.WithDaysintWindow length in days, from 1 to 1095, defaulting to 30.
nextmail.WithMinutesintWindow length in minutes, from 1 to 1576800, which wins over
dayswhen both are sent.nextmail.WithGrainstringBucket width:
minute,hourorday, defaulting today.nextmail.WithOffsetMinutesintMinutes east of UTC to cut the buckets in, from -840 to 840, defaulting to 0. For the local zone, pass the offset
time.Now().Zone()reports, divided by 60.nextmail.WithAPIKeystringOverrides the client API key for this call only.
Returns
An nextmail.Object with object set to broadcast_analytics, since, until, grain, offsetMinutes, broadcastIds, totals, series and broadcasts. totals has broadcasts and the counts BroadcastStatsTotals has, each entry of series is a map with bucket, sent, delivered, opened, clicked and unsubscribed, and each entry of broadcasts has id, subject, status, sentAt and the same counts.
Example
_, offset := time.Now().Zone() analytics, err := client.Broadcasts.Analytics(ctx, nextmail.WithDays(90), nextmail.WithOffsetMinutes(offset/60))if err != nil { return err} totals := analytics.Object("totals")rate := 0.0 if totals.Int("delivered") > 0 { rate = totals.Float("opened") / totals.Float("delivered")} fmt.Printf("%d broadcasts, %.0f%% opened\n", totals.Int("broadcasts"), rate*100) for _, row := range analytics.Objects("broadcasts") { fmt.Println(row.String("subject"), row.Int("sent"), row.Int("opened"), row.Int("clicked"))}Notes
Read only, so the SDK retries it after a network failure like any other read.
opened,clickedandunsubscribedcount people, whileopensandclickscount events.A key limited to particular addresses or domains reads only broadcasts sent from an address or domain it holds, and the rest are left out as if they did not exist.
Also available in
Broadcasts.ListRecipients
List who a broadcast went to and what happened to each copy
ListRecipients(ctx context.Context, id string, opts ...nextmail.RequestOption) (*nextmail.Page, error)Returns one page of the people a broadcast went to, one row per copy, sorted by address. Each row says the copy's status, when it was sent and delivered, whether it bounced or was reported as spam, how often it was opened and clicked, and whether the person unsubscribed from one of the broadcast's audiences after it went out.
Opens and clicks leave out image proxies and link scanners, and stay 0 when the broadcast went out with tracking off. emailId is the copy's msg_ id, which GetRecipient reads with its content and Emails.Get reads as a sent email.
Parameters
idstringRequiredA
brd_id fromSendorList.nextmail.WithFilterstringKeeps one group:
pending,sent,delivered,opened,not_opened(sent and never opened),clicked,bounced,complained,failed(failed or cancelled) orunsubscribed.BROADCAST_RECIPIENT_FILTERSnames them.nextmail.WithQstringSearches the address and the name, ignoring case.
nextmail.WithLimitintPage size, from 1 to 200. The server defaults to 50.
nextmail.WithCursorstringThe
NextCursorof the previous page. Send the samefilterandqwith it.nextmail.WithAPIKeystringOverrides the client API key for this call only.
Returns
A *nextmail.Page with Items, HasMore and NextCursor. Each item has emailId, contactId, email, name, status, sentAt, deliveredAt, bouncedAt, complainedAt, failure, opens, firstOpenAt, clicks, firstClickAt and unsubscribedAt.
Example
page, err := client.Broadcasts.ListRecipients(ctx, "brd_5a8c1e3f7b2d94a06c8e1f3b", nextmail.WithFilter("bounced"))if err != nil { return err} for _, recipient := range page.Items { fmt.Println(recipient.String("email"), recipient.String("bouncedAt"))} fmt.Println(page.HasMore, page.NextCursor)Notes
A missing broadcast fails with an
*nextmail.Errorwith codebroadcast_not_found.A key limited to particular addresses or domains reads only broadcasts sent from an address or domain it holds. Any other id fails with
broadcast_not_found, as if the broadcast did not exist.
Also available in
Broadcasts.ListAllRecipients
Collect everybody a broadcast went to into one slice
ListAllRecipients(ctx context.Context, id string, opts ...nextmail.RequestOption) ([]nextmail.Object, error)Walks every page of ListRecipients and returns with every copy of the broadcast, sorted by address. One request per page, with the same filter and q on each.
Parameters
idstringRequiredA
brd_id fromSendorList.nextmail.WithFilterstringKeeps one group:
pending,sent,delivered,opened,not_opened(sent and never opened),clicked,bounced,complained,failed(failed or cancelled) orunsubscribed.BROADCAST_RECIPIENT_FILTERSnames them.nextmail.WithQstringSearches the address and the name, ignoring case.
nextmail.WithLimitintPage size for each request, from 1 to 200. The server defaults to 50.
nextmail.WithCursorstringStarts the walk after this cursor instead of the first page.
nextmail.WithAPIKeystringOverrides the client API key for every page of this walk.
Returns
A []nextmail.Object holding every copy that matches.
Example
unopened, err := client.Broadcasts.ListAllRecipients(ctx, "brd_5a8c1e3f7b2d94a06c8e1f3b", nextmail.WithFilter("not_opened"))if err != nil { return err} for _, recipient := range unopened { fmt.Println(recipient.String("email"))}Notes
If any page fails the call fails and the rows already fetched are discarded.
A key limited to particular addresses or domains reads only broadcasts sent from an address or domain it holds. Any other id fails with
broadcast_not_found, as if the broadcast did not exist.
Also available in
Broadcasts.IterateRecipients
Walk everybody a broadcast went to, one copy at a time
IterateRecipients(ctx context.Context, id string, opts ...nextmail.RequestOption) *nextmail.IteratorYields every copy of the broadcast one at a time, fetching the next page only when the loop asks for it, sorted by address. Breaking out of the loop stops the requests.
Parameters
idstringRequiredA
brd_id fromSendorList.nextmail.WithFilterstringKeeps one group:
pending,sent,delivered,opened,not_opened(sent and never opened),clicked,bounced,complained,failed(failed or cancelled) orunsubscribed.BROADCAST_RECIPIENT_FILTERSnames them.nextmail.WithQstringSearches the address and the name, ignoring case.
nextmail.WithLimitintPage size for each request, from 1 to 200. The server defaults to 50.
nextmail.WithCursorstringStarts after this cursor instead of the first page.
nextmail.WithAPIKeystringOverrides the client API key for every page of this walk.
Returns
An *nextmail.Iterator yielding one copy per step.
Example
for recipient, err := range client.Broadcasts.IterateRecipients(ctx, "brd_5a8c1e3f7b2d94a06c8e1f3b", nextmail.WithFilter("clicked")).All() { if err != nil { return err } fmt.Println(recipient.String("email"), recipient.Int("clicks"))}Notes
Memory stays flat however large the broadcast, because only one page is held at a time.
A key limited to particular addresses or domains reads only broadcasts sent from an address or domain it holds. Any other id fails with
broadcast_not_found, as if the broadcast did not exist.
Also available in
Broadcasts.GetRecipient
Read one person's copy of a broadcast
GetRecipient(ctx context.Context, id string, emailID string, opts ...nextmail.RequestOption) (nextmail.Object, error)Returns one copy: the same row ListRecipients gives, plus the subject, html and text exactly as that person received them, with the merge fields filled in and their own unsubscribe link. The HTML is from before open and click tracking was added.
Parameters
idstringRequiredA
brd_id fromSendorList.emailIDstringRequiredThe
emailIdof the copy, fromListRecipients.nextmail.WithAPIKeystringOverrides the client API key for this call only.
Returns
An nextmail.Object: emailId, contactId, email, name, status, sentAt, deliveredAt, bouncedAt, complainedAt, failure, opens, firstOpenAt, clicks, firstClickAt and unsubscribedAt, plus subject, html and text.
Example
content, err := client.Broadcasts.GetRecipient(ctx, "brd_5a8c1e3f7b2d94a06c8e1f3b", "msg_01dad25067bc4dac966d515d")if err != nil { return err} fmt.Println(content.String("subject"), content.String("deliveredAt"))Notes
An
emailIdthat is not a copy of this broadcast fails with coderecipient_not_found.A key limited to particular addresses or domains reads only broadcasts sent from an address or domain it holds. Any other id fails with
broadcast_not_found, as if the broadcast did not exist.
Also available in
Broadcasts.Cancel
Stop a broadcast that is scheduled, queued or still sending
Cancel(ctx context.Context, id string, opts ...nextmail.RequestOption) (nextmail.Object, error)Stops a broadcast that is scheduled, queued or sending, including one that has reached everybody while some copies are still waiting to go. Nobody else is added, and every copy still waiting is cancelled. A copy already being handed over finishes, and copies that have gone cannot be recalled, so counts.sent keeps them and counts.cancelled shows what was stopped.
Once every copy has gone out there is nothing left to stop, and the call fails with 409 broadcast_not_cancellable. A failed broadcast with copies still waiting can be cancelled to stop them, and one with nothing waiting is refused the same way. Cancelling a broadcast that is already cancelled returns it as it stands, so the call is safe to repeat, and the SDK retries it after a network failure.
Parameters
idstringRequiredThe
brd_id to cancel.nextmail.WithAPIKeystringCancels with this key instead of the client's.
Returns
An nextmail.Object in its new state, status cancelled with cancelledAt set and the copies counted by where each one ended up.
Example
cancelled, err := client.Broadcasts.Cancel(ctx, "brd_5a8c1e3f7b2d94a06c8e1f3b")if err != nil { return err} fmt.Println(cancelled.String("status"), cancelled.Object("counts").Int("cancelled"))Notes
Cancelling a scheduled broadcast before
scheduledAtsends nothing at all.A cancelled broadcast stays cancelled. There is no resume, so send again to the audiences that still need it.
A key limited to particular addresses or domains cancels only broadcasts sent from an address or domain it holds. Any other id fails with
broadcast_not_found, as if the broadcast did not exist.
Also available in
Broadcasts.CreateDraft
Save a broadcast as a draft without sending it
CreateDraft(ctx context.Context, body nextmail.Body, opts ...nextmail.RequestOption) (nextmail.Object, error)Saves a broadcast with status draft. Nothing is sent, nothing counts against the plan and the audiences may still be empty, so a draft can be written over several sittings. Update changes it, SendDraft sends it or schedules it, and Get returns what it holds in content.
The body takes the fields Send takes, except scheduledAt, which belongs to SendDraft. Only from is required. The sender, the audiences and a template are checked as they are saved.
Parameters
fromstring or nextmail.BodyRequiredSender as
[email protected]orAcme <[email protected]>, or annextmail.Bodywithemailandname. It must be an address the key may send as, otherwise 403from_address_forbidden.audienceIds[]stringUp to 10 audience ids. Left out or empty, the draft has no audience yet and
SendDraftrefuses it untilUpdategives it one.excludeAudienceIds[]stringUp to 10 audiences whose members are left out, even when they are in one of
audienceIds.segmentIdstringA saved segment that narrows the audiences when the draft is sent. It has to exist when the draft is saved and again when it is sent.
replyTostring or nextmail.BodyWhere replies go, the same for every copy.
subjectstringAt most 998 characters, with merge fields. Needed before sending unless a template supplies it.
htmlstringHTML body, at most 1,000,000 characters, with merge fields.
textstringPlain text body, at most 1,000,000 characters, with merge fields.
templatenextmail.BodyA stored template instead of
htmlandtext, withidand, optionally,version,propsandslots.trackingnextmail.BodyOpen and link tracking for every copy, with
opensandclicks.tagsnextmail.BodyUp to 8 tags every copy carries.
utmnextmail.BodyCampaign tags added to every http and https link in the body, with
source,medium,campaign,termandcontent, sent asutm_sourceand the rest. A link that already carries one keeps its own, and the unsubscribe link never gets them.abTestnextmail.BodyAn A/B test, as
Sendtakes it.nextmail.WithAPIKeystringOverrides the client's API key for this call only.
Returns
An nextmail.Object, the broadcast with status draft, counts at 0 and the saved fields in content.
Example
draft, err := client.Broadcasts.CreateDraft(ctx, nextmail.Body{ "from": "Acme <[email protected]>", "audienceIds": []string{"aud_4c1b8e2a7d9f05c36b4e8a71"}, "subject": "The October release", "text": "Hi {{firstName|there}}, here is what changed this month.", "utm": nextmail.Body{"source": "newsletter", "medium": "email", "campaign": "october-release"},})if err != nil { return err} fmt.Println(draft.String("id"), draft.String("status"))Notes
A draft is listed by
Listbeside the broadcasts that went out, withstatusdraft.Refusals are 404
audience_not_found, 422audience_is_everyonewhenaudienceIdsnames All contacts, 403from_address_forbidden, and 422 ontemplate.*when the template does not resolve.
Also available in
Broadcasts.Update
Change a draft, or a scheduled broadcast before it starts
Update(ctx context.Context, id string, patch nextmail.Body, opts ...nextmail.RequestOption) (nextmail.Object, error)A partial update: a field you leave out keeps what it holds, and nil clears replyTo, html, text, template or utm. Sending any of html, text or template replaces the body as a whole.
A draft takes every change and stays a draft. A scheduled broadcast takes changes until its sending starts, and each change is checked the way Send checks a new one, so counts.recipients is counted again. scheduledAt moves a scheduled broadcast to another time. Once a broadcast is queued, sending or finished, the call fails with 409 broadcast_not_editable.
Parameters
idstringRequiredThe
brd_id of a draft or of a scheduled broadcast.audienceIds[]stringThe new audiences, replacing the old list, up to 10.
excludeAudienceIds[]stringThe new list of audiences whose members are left out.
segmentIdstring or nilA saved segment that narrows the audiences.
niltakes it away.fromstring or nextmail.BodyA new sender the key may send as.
replyTostring, nextmail.Body or nilWhere replies go.
niltakes it away.subjectstringA new subject, with merge fields.
htmlstring or nilA new HTML body.
textstring or nilA new plain text body.
templatenextmail.Body or nilA stored template instead of
htmlandtext.trackingnextmail.BodyOpen and link tracking for every copy.
tagsnextmail.BodyThe new tags, replacing the old ones.
utmnextmail.Body or nilNew campaign tags for the links.
niltakes them away.abTestnextmail.Body or nilA new A/B test, as
Sendtakes it.niltakes it away.scheduledAtstring or time.TimeA new start for a scheduled broadcast: an ISO 8601 instant or a duration such as
PT2H. A draft refuses it with 422invalid_parameter, sinceSendDraftschedules a draft.nextmail.WithAPIKeystringOverrides the client's API key for this call only.
Returns
An nextmail.Object, the broadcast as it stands after the change, with content.
Example
draft, err := client.Broadcasts.CreateDraft(ctx, nextmail.Body{"from": "[email protected]", "subject": "Draft"})if err != nil { return err} updated, err := client.Broadcasts.Update(ctx, draft.String("id"), nextmail.Body{ "audienceIds": []string{"aud_4c1b8e2a7d9f05c36b4e8a71"}, "subject": "Doors open on Friday", "text": "Hi {{firstName|there}}, doors open at nine.",})if err != nil { return err} fmt.Println(updated.String("status"), updated.String("subject"))Notes
A key limited to particular addresses or domains changes only broadcasts sent from an address or domain it holds. Any other id fails with
broadcast_not_found.Changing a scheduled broadcast can fail the way
Sendfails: 422no_recipients, 429send_quota_exceeded, 409stream_paused.
Also available in
Broadcasts.SendDraft
Send a draft now, or schedule it
SendDraft(ctx context.Context, id string, body nextmail.Body, opts ...nextmail.RequestOption) (nextmail.Object, error)Turns a draft into a broadcast that goes out: queued straight away, or scheduled when you pass scheduledAt. The draft is checked the way Send checks a new broadcast, so it needs an audience, a body, a subject or a template that supplies one, somebody to reach, and room in the plan for every copy.
A broadcast that is not a draft fails with 409 broadcast_not_draft, so calling it twice never sends twice.
Parameters
idstringRequiredThe
brd_id of the draft.scheduledAtstring or time.TimeAn ISO 8601 instant or a duration such as
PT2H, in the future and at most 365 days out. Left out, the sending starts straight away.nextmail.WithAPIKeystringOverrides the client's API key for this call only.
Returns
An nextmail.Object, the broadcast with status queued or scheduled and counts.recipients estimated at the call.
Example
draft, err := client.Broadcasts.CreateDraft(ctx, nextmail.Body{ "from": "Acme <[email protected]>", "audienceIds": []string{"aud_4c1b8e2a7d9f05c36b4e8a71"}, "subject": "Doors open on Friday", "text": "Hi {{firstName|there}}, doors open at nine.",})if err != nil { return err} sent, err := client.Broadcasts.SendDraft(ctx, draft.String("id"), nextmail.Body{"scheduledAt": "PT2H"})if err != nil { return err} fmt.Println(sent.String("status"), sent.String("scheduledAt"))Notes
Refusals are 409
broadcast_not_draft, 422no_recipients, 422invalid_parameterwhen the draft has no body or no subject, 429send_quota_exceeded, and 409stream_pausedwhile the broadcast lane of the workspace is paused.The SDK does not retry it after a network failure. Read the broadcast with
Getbefore calling again.
Also available in
Broadcasts.Duplicate
Copy a broadcast into a new draft
Duplicate(ctx context.Context, id string, opts ...nextmail.RequestOption) (nextmail.Object, error)Makes a new draft from any broadcast, with the same sender, audiences, left-out audiences, subject, body or template, tracking, tags and campaign tags. The time it was scheduled for is not copied. The original is not changed, and nothing is sent until SendDraft.
Parameters
idstringRequiredThe
brd_id to copy.nextmail.WithAPIKeystringOverrides the client's API key for this call only.
Returns
An nextmail.Object, the new draft with its own brd_ id, status draft and content.
Example
copied, err := client.Broadcasts.Duplicate(ctx, "brd_5e8a2c1f9b3d74e06a5c2f81")if err != nil { return err} fmt.Println(copied.String("id"), copied.String("status"))Notes
The sender, the audiences and the template are checked again as the copy is saved, so a copy of an old broadcast can fail with 403
from_address_forbiddenor 404audience_not_found.
Also available in
Broadcasts.Resend
Send a broadcast again to the people who did not open it
Resend(ctx context.Context, id string, body nextmail.Body, opts ...nextmail.RequestOption) (nextmail.Object, error)Creates a new broadcast with the same content for the people the first one reached and who have not opened it, optionally under a new subject. Somebody who has unsubscribed since, or whose address is now suppressed, is skipped. The new broadcast carries content.resendOf, and counts against the plan like any send.
The first broadcast has to have finished going out and to have tracked opens. Otherwise the call fails with 409 resend_unavailable.
Parameters
idstringRequiredThe
brd_id of the broadcast that went out.subjectstringA new subject for the second try, with merge fields. Left out, the first subject is used.
scheduledAtstring or time.TimeWhen to start, in the future and at most 365 days out. Left out, the sending starts straight away.
nextmail.WithAPIKeystringOverrides the client's API key for this call only.
Returns
An nextmail.Object, the new broadcast, queued or scheduled, with counts.recipients holding the people who had not opened.
Example
second, err := client.Broadcasts.Resend(ctx, "brd_5e8a2c1f9b3d74e06a5c2f81", nextmail.Body{ "subject": "In case you missed it: doors open on Friday", "scheduledAt": "P2D",})if err != nil { return err} fmt.Println(second.String("id"), second.Object("counts").Int("recipients"))Notes
Opens are counted from the tracking pixel, so somebody whose mail app blocks images can look like they never opened. Give a second try some days, and do not send it more than once.
Refusals are 409
resend_unavailable, 422no_recipientswhen everybody opened it, 429send_quota_exceeded, and 409stream_paused.
Also available in
Broadcasts.SendTest
Send a test copy of a broadcast to yourself or a few people
SendTest(ctx context.Context, body nextmail.Body, opts ...nextmail.RequestOption) (nextmail.Object, error)Sends one copy of a broadcast to up to five addresses, to read it before it goes to an audience. It goes to the account address of the person the key or app acts for, the workspace owner for an API key, unless to names others. The merge fields are filled from the contact that has the address when there is one and from a sample name otherwise, the subject starts with [Test], the unsubscribe footer is added as it would be and its link does nothing. Opens and clicks are not tracked, and utm is applied to the links.
No broadcast is created and nobody joins an audience. Each copy counts as one send.
Parameters
fromstring or nextmail.BodyRequiredThe sender, an address the key may send as.
to[]string1 to 5 addresses. Left out, the test goes to the account address of the person the key or app acts for.
replyTostring or nextmail.BodyWhere replies go.
subjectstringRequired unless a template supplies it, with merge fields.
htmlstringHTML body with merge fields.
textstringPlain text body with merge fields.
templatenextmail.BodyA stored template instead of
htmlandtext.utmnextmail.BodyCampaign tags added to the links, as the broadcast would add them.
nextmail.WithAPIKeystringOverrides the client's API key for this call only.
Returns
An nextmail.Object with the msg_ id of each copy in emailIds and the addresses in to.
Example
test, err := client.Broadcasts.SendTest(ctx, nextmail.Body{ "from": "Acme <[email protected]>", "to": []string{"[email protected]"}, "subject": "{{firstName|Hello}}, doors open on Friday", "html": "<p>Hi {{firstName|there}}, doors open at nine.</p>",})if err != nil { return err} fmt.Println(test.Strings("emailIds"), test.Strings("to"))Notes
The SDK does not retry it, since a retry would send the test again.