Sendmail

Locking Down your Mail Server

A successful lockdown involves two tasks - setting up sending authentication (SMTPAUTH) and spam filtering.

SMTP Auth

I took the two SMTP AUTH articles and re-wrote them with easier instructions. Click here for instructions to setup SMTP AUTH on your Sendmail Server

Spam Filtering - and Virus Filtering - why not!

This will get EXTREMELY complicated! Make sure your mail server is working properly. Make a backup of your mail server files:

cd /etc/mail cp sendmail.cf sendmail.cf.old cp sendmail.mc sendmail.mc.old

`Continue to Spam and Virus Filtering for Sendmail`

One quick note - I must give credit to all the sources I pulled on the Internet to get this thorough and concise spam filtering solution for Fedora Core/Cent OS servers. If you get lost in what I wrote, just refer to my sources:

Spam Proof and Virus Filtering e-mail server -
http://www.centos.org/modules/newbb/viewtopic.php?topic_id=4938

Centralized Spam Filtering:
http://www.stearns.org/doc/spamassassin-setup.current.html#sitewide

SMTP Auth for Mail Servers:
http://www.joreybump.com/code/howto/smtpauth.html
http://aput.net/~jheiss/sendmail/tlsandrelay.shtml

Article last reviewed: 12/14/2006

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