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github.com/emersion/go-smtp @v0.24.0
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294 symbols
924 edges
15 files
93 documented · 32%
17 cross-repo links
● updated 9d agov0.24.0 · 2025-08-05★ 2,02917 open issues
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README
go-smtp
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
Extension points exported contracts — how you extend this code
Backend (Interface)
A SMTP server backend. [3 implementers]
backend.go
Logger (Interface)
Logger interface is used by Server to report unexpected internal errors.
server.go
Session (Interface)
Session is used by servers to respond to an SMTP client. The methods are called when the remote client issues the match [3 …
backend.go
AuthSession (Interface)
AuthSession is an add-on interface for Session. It provides support for the AUTH extension. [2 implementers]
backend.go
LMTPSession (Interface)
LMTPSession is an add-on interface for Session. It can be implemented by LMTP servers to provide extra functionality. [1 …
backend.go
StatusCollector (Interface)
StatusCollector allows a backend to provide per-recipient status information. [1 implementers]
backend.go
Core symbols most depended-on inside this repo
Shape
Languages
Go100%
Modules by API surface
server_test.go72 symbols
client.go49 symbols
conn.go44 symbols
client_test.go35 symbols
backend.go17 symbols
parse.go14 symbols
server.go12 symbols
example_server_test.go11 symbols
cmd/smtp-debug-server/main.go11 symbols
smtp.go9 symbols
lmtp_server_test.go7 symbols
data.go7 symbols
Used by 17 indexed graphs manifest dependencies, hub-wide
… +7 more
For agents
$ claude mcp add go-smtp \
-- python -m otcore.mcp_server <graph>