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preventing outgoing mails from a "non local domain" such as "yahoo.com","hotmail.com" etc

Erol Kaymaz shared this idea 2 years ago
Open Discussion

Cpanel allows outgoing mails authenticated by a local users but from a non local domain

Please investigate below logs

I am able to send a mail from "erolfirst@yahoo.com" while getting authentication from a local user on my server

2015-07-17 13:47:26 1ZG3As-0004E7-LK H=(yet4) [188.59.29.125]:1035 Warning: Message has been scanned: no virus or other harmful content was found2015-07-17 13:47:26 1ZG3As-0004E7-LK <= erolfirst@yahoo.com H=(yet4) [188.59.29.125]:1035 P=esmtpa A=dovecot_login:erol2@yet1.com S=2768 id=005401d0c07d$fc6c8600$f5459200$@yahoo.com T="test" for erol@yetkinel.net2015-07-17 13:47:27 cwd=/var/spool/exim 3 args: /usr/sbin/exim -Mc 1ZG3As-0004E7-LK2015-07-17 13:47:27 1ZG3As-0004E7-LK SMTP connection outbound 1437130047 1ZG3As-0004E7-LK yet1.com erol@yetkinel.net2015-07-17 13:47:27 1ZG3As-0004E7-LK => erol@yetkinel.net R=lookuphost T=remote_smtp H=srv.quiksis.org [79.98.128.106] X=TLSv1:DHE-RSA-AES256-SHA:256 C="250 OK id=1ZG3Ad-0004yD-7F"2015-07-17 13:47:27 1ZG3As-0004E7-LK Completed

Comments (1)

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That's not a bug it's a feature :P It is basically exim's configuration. You can change it. There are ways like this

http://nixpal.com/block-outgoing-spoofed-emails-from-cpanel/


But it could be also possible for cPanel to create "buttons" (backend scripts basically) in WHM > Tweak Settings for example to block that.