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Prevent Spam from valid sender/recipient

From Qmailtoaster

How to prevent spam from a spoofed local account.

Example SMTP Log:

08-27 05:54:35 CHKUSER accepted sender: from <valid.email@account.no::> remote <[]:unknown:> rcpt <> : sender accepted
08-27 05:54:35 CHKUSER accepted rcpt: from <valid.email@account.no::> remote <[]:unknown:> rcpt <valid.email@account.no> : found existing recipient
08-27 05:54:35 policy_check: local valid.email@account.no -> local valid.email@account.no (UNAUTHENTICATED SENDER)
08-27 05:54:35 policy_check: policy allows transmission
08-27 05:54:35 spamdyke[28493]: ALLOWED from: valid.email@account.no to: valid.email@account.no origin_ip: origin_rdns: (unknown) auth: (unknown) encryption: (none)
08-27 05:54:39 simscan:[28494]:CLEAN (7.90/12.00):3.1911s:***SPAM*** Hi recipient, be our guest. 70% off for you.. on is the: 
$smtpServerAddress = 'localhost';
$smtpPort = 587;
$smtp_auth_mech = 'login';

(reference email list archive)

Retrieved from "http://wiki.qmailtoaster.com/index.php/Prevent_Spam_from_valid_sender/recipient"

This page has been accessed 4,732 times. This page was last modified on 13 September 2010, at 17:40. Content is available under GNU Free Documentation License 1.2.


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