go-smtp

An ESMTP client and server library written in Go.

Documentation

• Mailer - High-level SMTP
• Client - Low-level SMTP client
• Server - SMTP server
• Shared - Shared definitions e.g. SMTP status codes
• Tester - Testing utilities e.g. server with mail map

Pages

• Coverage
• Benchmark

Features

• ESMTP client & server implementing [RFC 5321]
• Support for additional SMTP extensions such as [AUTH] and [PIPELINING]
• UTF-8 support for subject and message

Relationship with emersion/go-smtp

This library is a fork of the great emersion/go-smtp. We try to modernize the api, the performance and supporting non standard extensions like XOORG. If you don't have performance issues or want something very stable, use upstream.

Relationship with net/smtp

The Go standard library provides a SMTP client implementation in net/smtp. However net/smtp is frozen: it's not getting any new features. go-smtp provides a server implementation and a number of client improvements.

Licence

MIT

• RFC 5321
• AUTH
• PIPELINING