HowtoMatrix

Lot of HOWTOs

August 12th, 2009

How To Log Emails Sent With PHP’s mail() Function To Detect Form Spam

Apache, Debian, Email, PHP, Security, Server, by suvi.

If you are running a webserver you might have faced the problem
already: somewhere on your server is a vulnerable contact form or CMS
system written in PHP that gets abused by spammers to send emails
trough your server. If you have more than a few websites, it is a pain
to detect which of the sites is vulnerable and sends the spam emails.
This tutorial explains the installation of a small wrapper script which
logs email messages sent trough the PHP mail() function.

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