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Simple SMTP Server for debugging

Project description

dsmptd: A debugger SMTP server for Humans

dsmtpd is a small tool to help the developer without an smtp server


$ dsmtpd -p 1025 -i
2013-01-13 14:00:07,346 INFO: Starting SMTP server at


For the installation, we recommend to use a virtualenv, it’s the easy way if you want to discover this package:

virtualenv ~/.envs/dsmtpd
source ~/.envs/dsmtpd/bin/activate

pip install dsmtpd


Execute dsmtpd with the –help flag and you will get the usage of this command:

dsmtpd --help

There are three options:

  • -p You specify the port of dsmtpd (default is 1025)

  • -i You specify the network interface (default is loopback,

  • -d You specify a Maildir directory to save the incoming emails

Use it

Here is a small example:


swaks --from --to  --server localhost --port 1025


git clone git://

Copyright 2013 (c) by Stephane Wirtel

dsmtpd Changelog

Here you can see the full list of changes between each dsmtpd release.

Version 0.3

Release on May 26th 2021.

  • Maildir capture: added early check (patch by Bernhard E. Reiter)

  • Remove the support of Docopt

  • Remove the support of Python 2.x (dead in 2020)

  • Support Python 3.6+

  • Improve the classifiers for PyPI

  • Migrate to PEP 517

  • Fix License into

  • Add tests for the CLI using argparse instead of docopt

Version 0.2

Release on January 21st 2013.

  • Allow to store the incoming emails in a maildir via the ‘-d’ argument

Version 0.1

Release on January 14th 2013.

  • Implement a basic server

  • Show the message in the log

Project details

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