How to automatically sign emails

[Ismael Valladolid Torres]

ml at charliesangels.biz escribe:
> We do use a Strange Pearl-Script to automatically sign emails. Basically
> our MTA (Exim) saves every mail to a maildir. Every mail ist then piped
> to the Script. However, whenever an attachement is included, the
> complete body of the email is removed.

Digitally signing mail messages without the user intervention doesn't
look like a Good Idea(TM).

Cordially, Ismael