-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Matthias Keller wrote:
> And just closing port 25 outgoing wont help for long as spammers just > switch to submission port Yes, but the point of using a submission port to segregate the traffic channels is not to obfuscate things for spammers, it's to allow a mail administrator to apply different acceptance criteria to the different channels. Connections arriving on port 25 can be assumed to come from servers with MX records, so that becomes a testable assumption and a precondition for connection. Connections arriving on the submission port can be assumed to come from clients, and those users presumably have local accounts they can authenticate with using SMTP auth. Spammers who simply redirect their traffic to the submission port won't get anywhere without also being able to defeat the SMTP auth component. - -- Robert LeBlanc <[EMAIL PROTECTED]> Renaissoft, Inc. Maia Mailguard <http://www.maiamailguard.com/> -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFFfbQWGmqOER2NHewRAv3IAJ0fzy9zFSR2thYXUQ+LM5yJlsED2ACdFllI kRu9WJMt16ptSIJcIdbcYZg= =FU86 -----END PGP SIGNATURE-----
