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What is opt_extremail?

opt_extremail is an opt package for the Fli4L project. It installs a SMTP and POP3 server on the router which can then be used to send e-mail internally on the LAN and together with opt_fetchmail to receive e-mails from the Internet.

eXtremail, the used mail server, can also be configured to forward e-mails to the internet, but this is not covered in the instructions. Since I myself don't use it for this purpose I can't answer any questions regarding this.

This package requires a hard disk in the router. The installation process and configuration is fairly complex. This package is not meant for beginners.

Note: I am tired that some people, to whom I gave my software for free, are bitching about that it contains bugs, that I take too much time for providing updates or bugfixes or that I don't answer support requests or answer them arrogantly. Therefore I will, effective immediately, stop any support and further development. The packages will still be available for download as they currently exist, but I will no longer answer any emails, accept bug reports or even fix any bugs. There will be no adaptations to new versions of FlI4L unless I need them for myself, and in that latter case there will no updated documentation, if I make the updates available at all.

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  • SMTP server to send internal e-mails
  • POP3 server to make internal and possibly e-mail retrieved via fetchmail available for clients
  • remote administration of the mail server via telnet

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You can download opt_extremail from the Fli4L homepage or from here.

Please note: opt_extremail is now maintained by Henri von Riel. You can download the latest version from The files that are available here are all older versions.

latest version / aktuelle Version
older versions / alte Versionen

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Legal status

opt_extremail is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

opt_extremail is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License (GPL). for more details.

Please note that eXtremail itself is not licensed under the GPL. The above licence only covers this opt package.

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last updated: 2012-10-14 twm
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