On 2/27/2014 8:31 PM, Nilesh Govindrajan wrote: > > One more possible way could be not allowing authentication on port > 25. Is that possible? That way I can be sure that I get only > incoming mail on port 25. >
Yes, that is a fairly common policy -- only allow AUTH on the submission port, not on port 25. # main.cf smtpd_sasl_auth_enable = no content_filter = amavis-smtp:[127.0.0.1]:10026 # master.cf submission inet n - n - - smtpd -o smtpd_sasl_auth_enable=yes -o content_filter=amavis-smtp:[127.0.0.1]:10024 ... other settings as required -- Noel Jones
