we're using a cyrus-postfix-mysql-system and we want to convert the old
style pgp mails, into the new MIME "standard". Normal, its prossible via
procmail, but it takes so much power, so i asking, if it is possible to
do that with sieve.
is it?
No. Simply put, this is not what sieve is for. Sieve is a mail filtering
language; it provides various constructs to test various aspects of
messages and various constructs to specify how a message should be handled.
It does not provide mechanisms to modify message content. So, while you
could in theory use sieve to test to see if a message was in the old
pgp format (assuming the yet-to-be-standardized body extension was
present), there's no way to perform the conversion you're after. That's
going to require a special sort of conversion program.
Ned