<div dir="ltr"><div><div><div>Thanks for reply...<br>But in other case the bounce is generated for other reasons<br></div>For example if the mailbox for the user is over quota, etc..<br>In this case the bounce is "dropped".<br></div>The question is why this "postfix/cleanup - MailScanner" header is too short ...and how to extend it :-(<br><br>Thanks again<br><br>---<br></div>Sim<br></div><div class="gmail_extra"><br><div class="gmail_quote">2014-11-10 18:16 GMT+01:00 Glenn Steen <span dir="ltr"><<a href="mailto:glenn.steen@gmail.com" target="_blank">glenn.steen@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">Actually... All you need do is configure recipient verification in postfix (this is in-built and documented well several places, like the postfix doc site or the MailScanner wiki). Alternatively maintain a relay recipient map or an access map (both are fairly trivial to set up).<br>
Doing any of these will reject instead of bounce, for unknown recipients. Flip side of the coin is that you may expose your recipient "universe", for easy mapping (regardless if you have disabled vrfy), but... That's just how it is:-) </p>
<p dir="ltr">Cheers<span class="HOEnZb"><font color="#888888"><br>
-- <br>
-- Glenn </font></span></p><span class="HOEnZb"><font color="#888888">
</font></span><div class="gmail_quote"><span class="HOEnZb"><font color="#888888">Den 10 nov 2014 14:03 skrev "Joolee" <<a href="mailto:mailscanner@joolee.nl" target="_blank">mailscanner@joolee.nl</a>>:</font></span><div><div class="h5"><br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Quite an easy solution is to simply don't bounce. E-mail to non-existing users is probably (uncought) spam and they rarely come from legit e-mail addresses. You are spamming the actual owners of the e-mail addresses being abused by sending backscatter to them. It might even get you listed on a backscatter dnsbl.<br><br>If you want to provide legit mail senders with a "this user doesn't exist" message, configure all legit users on your edge server so mail to non-existing users is being blocked on smtp level. (This will also reject ~90% of spam) The sending party can than implement any backscatter/messages they want with this information, it's not your problem.<br><br><br><div class="gmail_quote">On 10 November 2014 12:44, Sim <span dir="ltr"><<a href="mailto:simvirus@gmail.com" target="_blank">simvirus@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Hello to all!<br><br>I've a little issue...<br><br><span style="font-weight:bold">SENDER </span>(from <a href="mailto:test@extenal.com" target="_blank">test@extenal.com</a> to nomail@mydomain) ------> <b>MailScanner </b>-----><span style="font-weight:bold"> Mailbox Server</span> (@mydomain)<br><br>At this time my internal "Mailbox Server" generate a bounce for not exiting "nomail" account.<br>This bounce is detected as SPAM from MailScanner.<br><br>Note:<br>- The IP of Mailbox Server is in "Whitelist"<br>- The LAN (/24) of Mailbox Server is in "Trusted Network"<br>- The LAN (/24) of Mailbox Server is in "Outbound mail relay"<br>- All other email sent from "Mailbox Server" are detected as "white list"<br><br><code></code><br></div>Checking the log of postfix i've found this:<br><br>postfix/cleanup[20872]: C1C2960069: hold: header Received: from srv.mydomain.local (unknown [192.168.0.10])??(using TLSv1 with cipher AES128-SHA (128/128 bits))??(No client certificate requested)??by <a href="http://mail.mydomain.com" target="_blank">mail.mydomain.com</a> (Postfix) w from unknown[192.168.0.10]; from=<> to=<<a href="mailto:test@external.com" target="_blank">test@external.com</a>> proto=ESMTP helo=<srv.mydomain.local><br>[..]<br>MailScanner[19852]: Spam Checks: Starting<br>MailScanner[19852]: Message C1C2960069.AEB15 from 192.168.0.10 has no (or invalid) watermark or sender address, marked as high-scoring spam<br>MailScanner[19852]: Spam Checks: Found 1 spam messages<br><br><br>The header of postifx/cleanup is incomplete!!!!<br><br>Looking for full header i've seen: "(Postfix) with ESMTPS id C1C2960069?" and not only "(Postfix) w"<br><br><br>How to increase this "check of the header limit" in postfix, cleanup or MailScanner ?<br><br>Thanks<br></div>
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