it manages the list of users that the MTA will send mail to (a low overhead activity)
it validates messages sent to the list (it handles each message once, before it gets multiplied by potentially several orders of magnitude as it's sent out)
Posted Feb 4, 2011 11:08 UTC (Fri) by paravoid (subscriber, #32869)
[Link]
Have a look at Lamson, then.
LCA: Lessons from 30 years of Sendmail
Posted Feb 4, 2011 19:42 UTC (Fri) by dskoll (subscriber, #1630)
[Link]
From the "About Lamson" page:
However, as great as Lamson is for processing email intelligently, it isnt the best solution for delivering mail. There is 30+ years of SMTP lore and myth stored in the code of mail servers such as Postfix and Exim that would take years to replicate and make efficient. Being a practical project, Lamson defers to much more capable SMTP servers for the grunt work of getting the mail to the final recipient.