Schleuder/ documentation/ v2.2/

sending emails

Schleuder accepts every email it receives. So basically you can send any usual email also to a schleuder list. But probably you want to encrypt and sign you emails to make use of the security schleuder provides.

How to use GnuPG/PGP-encryption is beyond the scope of this document. Please refer to other howtos to learn that.

  • TODO: provide links to good GnuPG-Howtos. (Have you got an idea? Please tell us!)

As of version 2 schleuder can handle different character sets and attachments in both formats, pgp/mime (RFC 3156) and pgp-inline (encrypted content in a normally crafted email without special headers). Beware that with the latter you need to encrypt each attachment manually.

With some of the most popular email clients (e.g. mutt, Thunderbird, Evolution, Horde webmail, and others) schleuder was tested to work successfully. As there are so many email client which produce non-standard emails with some of them there may occur minor problems, but generally your emails should be handled properly. If you meet problems with your email client please send feedback.

  • TODO: Examples with settings for popular email clients

Schleuder decrypts every incoming email, stores some information on the incoming email inside the internal email (was it encrypted? signed?) and encrypts and sends it to each subscriber (aka list member). So if you're subscribed to the list you can check in every schleuder-email if it correctly recognized the encryption and signature of your email in the text-block in the beginning of the email schleuder sent back to you.


To encrypt emails to the schleuder-list you need the public key of the list. Schleuder is willing to send you (and anybody else) that key automatically: just send an email to listname-sendkey@hostname and you will receive the key as a reply without bothering any list-member. E.g. to receive the key for our contact address write a mail to

For list-members schleuder provides some advanced features like resending emails to non-subscribers and more. Those are described in special commands.