/smtp-sink-container

Primary LanguageDockerfile

smtp-sink container

synopsis

docker build --tag smtp-sink:3.6.2 .
# or
docker build --tag smtp-sink:3.6.2-busybox --target busybox .
# or
docker build --tag smtp-sink:3.6.2-alpine --target alpine .

docker run --name smtp-sink --publish 1025:1025 --rm smtp-sink:3.6.2

caveats

  • no authentication: Although smtp-sink can be configured to announce PLAIN and LOGIN authentication support, it does not respond well to AUTH requests. Clients might expect a 334 (continue) or 235 (authentication succeeded) status code (see RFC4954), while smtp-sink always responds with a 250 (ok).

    Example with Busybox's sendmail:

    $ sendmail -amPLAIN -auUSERNAME -apPASSWORD -f sender@localhost -S 127.0.0.1:1025 -t -v
sendmail: recv:'220 smtp-sink ESMTP'
sendmail: send:'EHLO 2618a41d8d19'
sendmail: recv:'250-smtp-sink'
sendmail: recv:'250-PIPELINING'
sendmail: recv:'250-8BITMIME'
sendmail: recv:'250-AUTH PLAIN LOGIN'
sendmail: recv:'250 '
sendmail: send:'AUTH PLAIN'
sendmail: recv:'250 2.0.0 Ok'
sendmail: AUTH PLAIN failed

  • no SSL/TLS connections

see also