hi,

how to defend from spam mail, actually i used centos.

i want to absolutely block spam, my Mailscanner running ok but the spam still run off to my server.

i do everything from tuning mailscnnner, spamassassin, amaisd-new but spam still send to user 10-20 per days.


please help this

Take a look at
http://en.wikipedia.org/wiki/Anti-spam_techniques


Kind regards

You have to tell the mail scanners what is and is not spam. Be aware that the only way to receive zero spam is to not receive email at all.

already done with some tuning at etc/postfix/main.cf


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disable_vrfy_command = yes
smtpd_delay_reject = yes
smtpd_helo_required = yes
smtpd_helo_restrictions = permit_mynetworks,
reject_non_fqdn_hostname,
reject_invalid_hostname,
permit
smtpd_recipient_restrictions = reject_unauth_destination
permit_sasl_authenticated,
reject_invalid_hostname,
reject_non_fqdn_hostname,
reject_non_fqdn_sender,
reject_non_fqdn_recipient,
reject_unknown_sender_domain,
reject_unknown_recipient_domain,
permit_mynetworks,
reject_rbl_client list.dsbl.org,
reject_rbl_client sbl.spamhaus.org,
# reject_rbl_client cbl.abuseat.org,
reject_rbl_client dul.dnsbl.sorbs.net,
permit

and do amavis tuning with main.cf