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<div><span class="gmail_quote">On 28/03/2008, <b class="gmail_sendername">Damian Rivas</b> <<a href="mailto:damian@cht.com.ar">damian@cht.com.ar</a>> wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"><br>>Hi all, anyone help with some good rules to combat backscatter email?<br>i seem to have a real problem with this at the moment, mostly bouncing<br>
back from .ru domains to my customers. i'm sure a ruleset will help but<br>i'm not certain what would >be best, header checks or something in the<br>spam rules?<br>><br>>thanks<br>><br>>SMJ<br><br>
The solutions depends on your MTA, if you are using sendmail check this:<br><br><a href="http://elqui.dcsc.utfsm.cl/util/email/backscatter.html">http://elqui.dcsc.utfsm.cl/util/email/backscatter.html</a><br><br>And this:<br>
<br><a href="http://www.spamcop.net/fom-serve/cache/329.html">http://www.spamcop.net/fom-serve/cache/329.html</a><br><br>If you are using postfix check this:<br><br><a href="http://www.postfix.org/BACKSCATTER_README.html">http://www.postfix.org/BACKSCATTER_README.html</a><br>
<br>If you have another MTA just google "mta+backscatter" and you'll find<br>tons of information.<br>--<br>MailScanner mailing list<br><a href="mailto:mailscanner@lists.mailscanner.info">mailscanner@lists.mailscanner.info</a><br>
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<div>thanks, the unknown_local_recipient_reject_code = 450 and relay_recipient_maps = hash:/etc/postfix/relay_recipients is a good start but it doesn't help if a customer has something like info@ / enquiries@ etc that are easy to guess.</div>
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<div>i'm also running version 2.3.4 so it's well protected against backscatter by default.</div>
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<div>if you have seen something else i've missed on google relating to postfix i'd appreciate a pointer.</div>
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<div>SMJ</div>