go-smtp

Go Reference

An ESMTP client and server library written in Go.

Features

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

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]: https://tools.ietf.org/html/rfc5321 [AUTH]: https://tools.ietf.org/html/rfc4954 [PIPELINING]: https://tools.ietf.org/html/rfc2920 [LMTP]: https://tools.ietf.org/html/rfc2033