Signing all outgoing mails on MTA, not on MUA

Christoph Gröver grover at
Fri Mar 27 15:47:27 CET 2009

Hello List,

We'd like to be able to sign all our outgoing mails.

But not on each client system, which would mean everyone has to install
some plugin or gpg-aware mail client, but on the mailserver itself.

This way nobody has to think about it and signing works transparently
for everyone. We would have one key for all, like a corporate key.

Is this possible ?  I understand we will have to parse and rebuild the
mime structure for this ?

What do you think ?

Thank you for your time,


Christoph Groever, grover at

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