---
title: "Developers articles"
description: "Building on email: APIs, SDKs, protocols and the events that keep an app in step with a mailbox."
url: "https://nextmail.sh/blog/tags/developers"
---

[Blog](https://nextmail.sh/blog.md)

# Developers

Building on email: APIs, SDKs, protocols and the events that keep an app in step with a mailbox.

Oct 31, 2026 6 min read

## How to build your own email client on Nextmail

What you need to build your own email client on Nextmail: OAuth sign-in for your users, typed SDKs in seven languages, live events, webhooks and raw messages.

Arta Developers

Oct 31, 2026 5 min read

## Email as a mailbox: why AI agents need a real inbox

Most email APIs only send. What a real mailbox adds for apps and AI agents, the four ways to get one in 2026, and how much code each leaves you.

Benjamin AI

Oct 31, 2026 9 min read

## Resend pricing in 2026: what it costs, how to pay less

What Resend costs at 50,000 to 1,000,000 emails a month, with every plan, overage rate and add-on, and what the same mail costs on Nextmail.

Benjamin Comparisons

Oct 31, 2026 10 min read

## What is IMAP? How IMAP works: ports, sync and security

IMAP is how mail apps read and organise mail that stays on the server, in sync on every device. How it works, which port to use and how it compares with POP3.

Arta Protocols

Oct 31, 2026 6 min read

## What is JMAP? The JSON email protocol, explained

JMAP is the IETF standard for email, contacts and calendars over JSON and HTTPS. How it works, how it differs from IMAP, and who supports it in 2026.

Arta Developers

Oct 31, 2026 10 min read

## What is SMTP? How it works, from ports to reply codes

SMTP is the protocol that carries email from your app to your provider and between mail servers. How it works, which port to use and what each reply means.

Benjamin Protocols

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## Your email, on your own domain.

Nextmail puts your domains, sending and inbox in one place, with the full API on every plan, the free one included.

[Open mail](https://nextmail.sh/mail/inbox) [Get Started](https://nextmail.sh/signup.md)