-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 5/19/10 9:12 PM, Jean-Paul Natola wrote: > > >> The only real problem, validating recipients at the front MX, based >> on the data in the backend Exchange servers. > > I think it would be easier to just accept only emails for your > domain(s) at your mta (postfix or exim), then enable the antispam > filter on exchange and configure it drop (not reject / bounce) any > messages to invalid addresses.
Why in the world would you do that? Accepting all addresses just invites dictionary attack abuse and wastes bandwidth. Do it right and use recipient verification in postfix. Always reject unknown users at the front door, immediately. You can't give bots an inch or they'll take a mile. - -- David Morton <morto...@dgrmm.net> Morton Software & Design http://www.dgrmm.net - Ruby on Rails PHP Applications Maia Mailguard http://www.maiamailguard.com - Spam management for mail servers -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iD8DBQFL9J5dUy30ODPkzl0RAiBpAJ4oxThitdC1FwDy3K0u2yyA8SXIngCdHqxA HwyjQNmB3bEI7kUqOeTrGlI= =jXzG -----END PGP SIGNATURE-----
