Email and SMTP testing with web and API interface.

Email and SMTP testing tool for developers.

All-in-one (SMTP, IMAP, DKIM, DMARC, MTA-STS, DANE) email server

Modern full-featured secure mail server for low-maintenance, self-hosted email.

Golang package that generates clean, responsive HTML e-mails.

A robust and flexible email library for Go.

IMAP library for clients and servers.

A Go library for email verification without sending any emails.

SendGrid's Go library for sending email.

A simple Go library for sending mails in Go.

Go library for sending mail with the Mailgun API.

Very simple package to send emails with SMTP Keep Alive and two timeouts: Connect and Send.

Streaming library for the Internet Message Format and mail messages.

CSS inliner for your HTML emails.

Lightweight SMTP client providing an HTTP API.

Inline styling for HTML mail in Go.

Send encrypted emails to blockchain addresses written in Go.

Lightweight configurable multithreaded fake SMTP server. Mimic any SMTP behaviour for your test environment.

Configurable Golang email validator/verifier. Verify email via Regex, DNS, SMTP and even more.

DKIM library, to sign & verify email.

SMTP server protocol state machine.

Golang library for providing a canonical representation of email address.

Modular email validator for syntax, disposable, smtp, etc... checking.

Mailx is a library that makes it easier to send email via SMTP. It is an enhancement of the golang standard library net/smtp.