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go-smtp

coverage reference report

An ESMTP client and server library written in Go.

Documentation

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

See examples for more information.

Pages

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