<div dir="ltr"><div><div>don't bounce emails that are selected as spam, no reason to anyway.<br></div>Check for valid recipients on inbound at the MTA and use that to reject the connection, using a decent delay on initial connection and use greylisting are all easy reasons to reject at MTA.<br>
<br></div>But after that it can quite a job to process the email for spam/malware so doing post 'acceptance' is still fine IMHO <br></div><div class="gmail_extra"><br clear="all"><div>-- <br>Martin Hepworth, CISSP<br>
Oxford, UK</div>
<br><br><div class="gmail_quote">On 30 April 2013 08:49, Jonas Akrouh Larsen <span dir="ltr"><<a href="mailto:jonas@vrt.dk" target="_blank">jonas@vrt.dk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span style lang="EN-US">Hi Glenn<u></u><u></u></span></p><div class="im">
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<p class="MsoNormal"><span style lang="EN-US"><u></u> <u></u></span></p>
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<div>
<p class="MsoNormal"><span style lang="EN-US">>That MailScanner doesn't operate at SMTP-time is exactly what sets it apart... It is the fundamental difference that make MailScanner perform so >much better, and suffer from so much less risk of
DoS:ing, than amavisd ...<u></u><u></u></span></p>
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<div>
<p class="MsoNormal"><span style lang="EN-US">>Sure, you cannot do "on the fly rejections", but ... AV/Anti-UCE scanning is to expensive at that stage anyway (IMO)... apart from the simple >things you can do in the MTA, that is (recipient verification,
rfc strictness, graylisting etc). But the benefits of not doing it in one go, as amavisd >does, far outweigh that drawback.<u></u><u></u></span></p>
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<p class="MsoNormal"><span style lang="EN-US">>If one were to somehow wrangle MailScanner into action during SMTP... one could as well use amavisd instead;-).<u></u><u></u></span></p>
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<p class="MsoNormal"><span style lang="EN-US">><u></u> <u></u></span></p>
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<p class="MsoNormal"><span style lang="EN-US">>As for choice of MTA, one should always stick with the one one is most comfortable with ... You're far less likely to foobar things if you know >what you're doing:-). If one starts from scratch, taking
into account what happens to be the default on the system you use seem like a very sound >strategy:-).<u></u><u></u></span></p>
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<p class="MsoNormal"><span style lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"" lang="EN-US">I’ve stuck with exim+MS for 5 years so I guess I must be liking it for the most part
</span><span style="font-size:11.0pt;font-family:Wingdings">J</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"" lang="EN-US"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"" lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"" lang="EN-US">However I do find it annoying not being able to scan at smtp time, it would be much simpler for bounces and such, and rid my outgoing queue of mails
I can’t return to sender because it was forged etc.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"" lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"" lang="EN-US">Also it shouldn’t run in parallel, so it’s no more expensive than running it post smtp, since you don’t spam scan a virus, you don’t virusscan something
listed on rbl etc.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"" lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"" lang="EN-US">But thanks for the comments
</span><span style="font-size:11.0pt;font-family:Wingdings" lang="EN-US">J</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"" lang="EN-US"><u></u><u></u></span></p><div class="im">
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"" lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"" lang="EN-US">Med venlig hilsen / Best regards<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"" lang="EN-US"> <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"" lang="EN-US">Jonas Akrouh Larsen<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"" lang="EN-US"> <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"" lang="EN-US">TechBiz ApS<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Laplandsgade 4, 2. sal<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">2300 København S<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> <u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"" lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"" lang="EN-US"><u></u> <u></u></span></p>
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