filtering email

[Tarjei Huse]

On Fri, 2003-10-24 at 13:50, Ken Murchison wrote:
> 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.
What kind of program?

Maybe it is simpler to do this at the mta level (if it's spam or
viruses) and/or run amavisd-new with a special extension.

tarjei

> > :)
> > 
> > 
> > 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.