Sendiing mail triggers fetchmail...

[Chris T.]

I'm going to set a cron job to get mail repeatedly.

I was just wondering if anyone know if it's possible to get postfix to 
execute a script before or after it sends mail.  I'd like to schedule a 
special fetchmail cron job for say 5 seconds after mail is sent on an 
account.  I'm doing a search on the subject but I obviously don't know 
the proper search terms yet.

And similarly can Cyrus-Imap trigger a script before and or after mail 
retrieval?

Chris