filtering email

[Ken Murchison]

Tom Allison wrote:

> I have a question that might be more about sieve than cyrus, but 
> hopefully they are related enough that I can get away with this question.
> 
> :)
> 
> 
> procmail has the ability to "shell out" and run other commands as needed 
> on the basis of the email content.
> I can use certain filtering criterial to initiate an external program.
> 
> Can you do anything like this under sieve/cyrus-imap?

No.  Sieve was designed to be safe for the average user.  People can do 
a lot of stupid things with procmail, including losing their mail.

> sieve, as I understand it, is an application which is "sandboxed" and 
> not capable of being used to shell out to another application.
> 
> At this point, it seems my only option to to attempt sticking procmail 
> in the middle of the delivery process.
> It's a bit of a slow down, but there might not be a choice in the 
> matter....

You can still use procmail, but it makes things a *lot* more expensive, 
unless it now supports LMTP (I haven't looked in a while).  For every 
message, you'll have 4 processes executed -- your MTA (Sendmail, 
Postfix, etc), procmail, deliver, lmtpd.  If procmail supports LMTP, you 
drop the deliver piece.  If you stick with Sieve, then you only have the 
first and last.

-- 
Kenneth Murchison     Oceana Matrix Ltd.
Software Engineer     21 Princeton Place
716-662-8973 x26      Orchard Park, NY 14127
--PGP Public Key--    http://www.oceana.com/~ken/ksm.pgp