Developers
Everything you can build,
on the mailbox your team already reads.
43 features for your code: sending, timing, events, keys and the clients that call them. Each one links to how it works.
Write one call. Delivery is on us.
Anything that speaks HTTP can send. TypeScript, Python, Ruby, PHP, Go, Java and C# get typed clients, and every message reports back as it is queued, sent and delivered.
Templates
A body written once, versioned, and sent many times: from the composer, from your own code, or by an agent.
Attachments
Pick them with the paperclip or paste them in. A pasted image lands in the body rather than the file list, and a file dragged onto the composer is not attached at all. In a mailbox hosted on Nextmail, incoming files sit in object storage, one object each, and a file is fetched only when you open or download it.
Checks before you send
Your draft scored for spam, phishing and AI writing as you write it, the way a receiving server would read it.
Send once. Exactly when you meant to.
A retry never sends twice, a send can wait up to a year, and an undo window lasts up to fifteen minutes.
Events as they happen
Webhooks tell your endpoint the moment mail arrives, is delivered, bounces or gets a reply.
See when mail you sent was opened
Whether a message you sent has been opened, when, how many times and which of its links were followed. Off until you turn it on, and plain about the readings it cannot get.
Every door, up close.
Use the typed SDK, script the CLI, connect an agent over MCP, or speak plain HTTP.
Access you can narrow
A key carries its own scopes, a sending address and an expiry. An app signs in with OAuth and gets only what you approve.
read, or read and send as it, with nothing else visible
Everything the app does, your code does.
Threads, search, labels, drafts and contacts are calls too, on the mailbox your team already reads.
Search by words or meaning
Forgiving words, operators like from: and has:, and search by meaning, inside the folder you are reading.
Drafts
Autosaved three seconds after you stop typing, and reopened from the Drafts folder with the recipients, the subject, the body and the From address intact. The attachments stay behind.
Recipient suggestions
The people you already write to, offered as you type. The address book syncs with Apple Contacts and other CardDAV apps.
Mute
Silence a conversation you no longer need to follow. New replies skip the inbox and alert nobody.
Inbox tabs
The inbox sorted into Primary, Promotions, Updates, Social and Forums, so mail from people comes first.
Out of office
An automatic reply from one address while you are away, with a start, an end and your own words.
Coming from Resend? Change two lines.
Point the Resend SDK at Nextmail and keep your code, then bring contacts, templates and webhooks across.
Move from Resend
Bring your suppressions, audiences, contacts, templates and webhooks across with one key, with a checklist for your domains and API keys.
Move from SendGrid
Point the SendGrid SDK at Nextmail and keep your code, then bring lists, suppressions, templates and webhooks across with one key.
Move from Postmark
Point the Postmark client at Nextmail and keep your code, then bring suppressions, templates and webhooks across with one key.