how to block spammer using my mailserver
- by fike
how to defend my mailserver using by spammer to send email to etc yahoomail , gmail , etc
my mail server now blocked by gmail.
already setting to block of all that but still attacked by spammers
below log mail:-
Jun 24 03:29:26 abcd sendmail[13373]: q5NHV7Jm001938: to=, ctladdr= (525/528), delay=02:58:10, xdelay=00:00:02, mailer=esmtp, pri=3212216, relay=mta7.am0.yahoodns.net. [67.195.168.230], dsn=431, stat=Deferred: 452 Too many recipients
I really appreciate for the advice and assistance .