Users must, at least, check for incoming mail via POP3 or IMAP4 or a Web interface (which is a front end for IMAP4) before they're allowed to send any mail.
POP-before-SMTP was quite common awhile back, before SMTP AUTH really got widespread support. Is there a reason (other than "it's not broken, don't fix it" which is valid) why you haven't moved your SMTP cluster to use SMTP AUTH? Just curious.
Also, when I get the HOWTO roughed up and nearly finished, would you be OK with me sending you a copy and asking for your reviews/comments/feedback?
Cheers,
-- Rodolfo J. Paiz rpaiz@xxxxxxxxxxxxxx http://www.simpaticus.com
