I don't know about any such script, but what I use for this (works with all backend SMTP servers, not just Exchange) is milter-ahead. Works great - been using it for years on a number of MailScanner servers.<br><br><br>
Chris<br><br><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, Nov 21, 2012 at 2:58 PM, Jonas Lilja <span dir="ltr"><<a href="mailto:jonas.lilja@sigma.se" target="_blank">jonas.lilja@sigma.se</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div link="blue" vlink="purple" lang="SV">
<div>
<p class="MsoNormal"><span lang="EN-US">Hi, for a couple of years ago there was a guide on <a href="http://mailscanner.info" target="_blank">mailscanner.info</a> about restricting the MTA (Sendmail) to only deliver email to valid users in an Exchange environment. This made the performance of the server much better
because either MailScanner or Spamassassin need to process invalid emails.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">I remember that there was a perl-script which picked up the content from a textfile (with all smtp-addresses in the domain) and then build a special file in /etc/mail/<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">I can’t find this guide on the site. Anyone who can help me?<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">BR /Jonas Lilja<u></u><u></u></span></p>
<p class="MsoNormal"><span><u></u> <u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
</div>
<br>--<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>
<br></blockquote></div><br><br clear="all"><br>-- <br>Chris Stone<br>AxisInternet, Inc.<br><a href="http://www.axint.net">www.axint.net</a><br><br>
</div>