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I am struggling to prevent SPAM generated from my server.

my mail.log reads like this:

<[email protected]> from p57bfa587.dip0.t-
ipconnect.de[87.191.165.135]; from=<[email protected]
o.in> to=<[email protected]> proto=ESMTP helo=<p57bfa587.dip0.t-
ipconnect.de>

mywebsolutions.co.in is my domain. but p57bfa587.dip0.t- ipconnect.de is not neither [email protected]

Now I want to block any unknown sender. but couldn't find anyway to prevent this.

I have also added in my postfix main.cf

smtpd_reject_unlisted_sender = Yes

Also smtpd_sender_restrictions = reject_unlisted_sender

Full Block reads like this: smtpd_sender_restrictions = reject_unlisted_sender, check_sender_access regexp:/etc/postfix/tag_as_originating.re , permit_mynetworks, permit_sasl_authenticated, check_sender_access mysql:/etc/postfix/mysql-virtual_sender.cf, check_sender_access regexp:/etc/postfix/tag_as_foreign.re smtpd_client_restrictions = check_client_access mysql:/etc/postfix/mysql-virtual_client.cf

What rule I should change or update to prevent SPAM Originating from my server.

Joshi
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  • You have much larger issue, sorry to say this. If your server is generating SPAM, it means it is **compromised**. https://serverfault.com/questions/218005/how-do-i-deal-with-a-compromised-server – Miloš Đakonović May 04 '17 at 21:34
  • Additionally take a look at this http://www.postfix.org/postconf.5.html#authorized_submit_users in order to immediately stop web server user (`apache2` or `www-data`) to send spam. – Miloš Đakonović May 04 '17 at 21:38

0 Answers0