Kaz Kylheku wrote:
Not really; I already googled up that you can get an nice sieve implementation with Dovecot. I wanted to get it working with Exim. I don't want to risk a working, live e-mail set up by switching to a whole other MTA, that's all.
??
Dovecot is not an MTA, it is a POP/IMAP server, so it would replace your Courier, not Exim (and yes, with dovecot you can still use Exims LDA if you want, although you lose the advantage of dovecots indexes being automatically updated at deliver time if you don't use the dovecot LDA).
Dovecot, quite simply, smashes Courier's face in, so you would only be doing yourself and your users a huge favor by switching to it.