<div dir="ltr">Null sender is RFC standard for NDRs.</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, Apr 17, 2013 at 3:11 AM, Rick Cooper <span dir="ltr"><<a href="mailto:rcooper@dwford.com" target="_blank">rcooper@dwford.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">Raymond Norton wrote:<br>
> I am using MailScanner 4.84.5 with postfix. I have one relay domain<br>
> getting hit hard by non delivery notices which are missing any info<br>
> in the "From" field.<br>
><br>
> Is there a rule I can add to postfix that will bounce messages like<br>
> this?<br>
><br>
><br>
> Raymond<br>
<br>
</div>You should not bounce or reject anything based on null senders as that<br>
prevents legitimate bounces.<br>
You do not state if the TO addresses are valid, if they are you will have to<br>
deal with it unless you see a pattern of valid users that are getting the<br>
bounces, in which case (I have had to do this in the past) we deny or<br>
redirect bounces to that/those users that also have a null sender. If they<br>
are invalid then you should be rejecting them at RCPT time.<br>
<br>
My philosophy is I NEVER bounce anything. Once accepted it's my problem and<br>
I do not accept non deliverable emails, or emails that are supposedly coming<br>
from my domain but not one of my servers or any Hard fail SPF result or<br>
failed DKIM, or other criteria. Once I take it it's my problem so I just<br>
don't take problems<br>
<span class="HOEnZb"><font color="#888888"><br>
Rick<br>
</font></span><div class="HOEnZb"><div class="h5">--<br>
MailScanner mailing list<br>
<a href="mailto:mailscanner@lists.mailscanner.info">mailscanner@lists.mailscanner.info</a><br>
<a href="http://lists.mailscanner.info/mailman/listinfo/mailscanner" target="_blank">http://lists.mailscanner.info/mailman/listinfo/mailscanner</a><br>
<br>
Before posting, read <a href="http://wiki.mailscanner.info/posting" target="_blank">http://wiki.mailscanner.info/posting</a><br>
<br>
Support MailScanner development - buy the book off the website!<br>
</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><div dir="ltr"><div><div><br>--<br></div>Jerry Benton<br></div>Mailborder Systems<br><a href="http://www.mailborder.com" target="_blank">www.mailborder.com</a><br>
</div>
</div>