emersion/go-smtp
📤 An SMTP library for Go clients and servers observed · 2026-08-28
Health v2 · maintenance only
94/100
- Activity 98
- Release rhythm 85
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.
- gap_med: 62
- age_days: 3696
- days_rel: 20
- days_push: 15
- n_releases_24m: 4
Adoption not part of the score
2042 stars · 270 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
An ESMTP client and server library for Go implementing RFC 5321 with extensions like AUTH, PIPELINING, and LMTP. It improves on the frozen net/smtp standard library package by adding server support and client enhancements.
Use cases
- send email from a Go application
- build an SMTP server in Go
- implement LMTP for a mail server
- add SMTP AUTH support to a mail client
- replace net/smtp with a maintained library
- receive and parse incoming mail in Go
When to choose
- you need both SMTP client and server functionality in Go
- you need SMTP extensions like AUTH, PIPELINING, or LMTP
- you want an actively maintained alternative to net/smtp
When to avoid
- you only need basic SMTP sending and net/smtp suffices
- you need a full mail transfer agent rather than a library
- you are not working in Go
Facets
library · maturity active
email http-server auth email backend developer-tools go cross-platform smtp esmtp lmtp mail-server mail-client rfc5321
1 source
- readme: https://github.com/emersion/go-smtp · fetched 2026-08-28 · 3847e8393213
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| emersion/go-smtp | main | 94 |
For agents
markdown · JSON · MCP: product_card(name="emersion/go-smtp")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem