A generic SMTP server and client in Erlang that can be extended via callback modules
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Provide a generic SMTP server and client framework that can be extended via callback modules in the OTP style. The goal is to make it easy to send and receive email in Erlang without the hassle of POP/IMAP. This is not a true mailserver - although you could build one with it.

The SMTP server/client supports PLAIN, LOGIN, CRAM-MD5 authentication as well as STARTTLS and SSL (port 465).

Also included is a MIME encoder/decoder, sorta according to RFC204{5,6,7}.

I (Vagabond) have had a simple gen_smtp based SMTP server receiving and parsing copies of all my email for several months and its been able to handle over 100 thousand emails without leaking any RAM or crashing the erlang virtual machine.

Current Participants


Here's an example usage of the client:

gen_smtp_client:send({"whatever@test.com", ["andrew@hijacked.us"],
 "Subject: testing\r\nFrom: Andrew Thompson \r\nTo: Some Dude \r\n\r\nThis is the email body"},
  [{relay, "smtp.gmail.com"}, {username, "me@gmail.com"}, {password, "mypassword"}]).

The From and To addresses will be wrapped in <>s if they aren't already, TLS will be auto-negotiated if available (unless you pass {tls, never}) and authentication will by attempted by default since a username/password were specified ({auth, never} overrides this).

If you want to mandate tls or auth, you can pass {tls, always} or {auth, always} as one of the options. You can specify an alternate port with {port, 2525} (default is 25) or you can indicate that the server is listening for SSL connections using {ssl, true} (port defaults to 465 with this option).