Hi Paul,<br><br><b><i>"Paul R. Ganci" <ganci@nurdog.com></i></b> wrote:<blockquote class="replbq" style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"> Michael Mansour wrote:<br>> DCC's greylist work fine for *non-MX* servers, however for inbound MX <br>> servers which don't have local recipients (but pass the message onto <br>> an internal mail server after releasing the message from the embargo), <br>> DCC greylist tries to authenticate the recipients with the MX server <br>> itself, which of course fails with a "user unknown" and bounces the <br>> message to the sender.<br>><br>> DCC greylist doesn't bother reading sendmail's mailertable to <br>> determine where the destination recipient is or to even consider that <br>> it's just an inbound MX server and should just greylist (embargo in <br>> DCC terminology) the email and then send it on to the real mail server <br>> with the
inboxes.<br>><br>> I explained and reported this problem to Vernon but he didn't accept <br>> it as a problem, instead tried to convince me that I didn't need MX <br>> servers and I should just run a beefy mail server.<br>><br>> A few emails bounced between us before I gave up trying to explain to <br>> him why his greylist <br>I run a small ISPs Email system where we have two inbound servers with <br>MX records which just forward to the server with the inboxes. I use DCC <br>on both servers with greylisting enabled. I do not have the problem you <br>describe ... my inbound servers do not try to authenticate users. Are <br>you sure that you don't just have some kind of configuration issue?<br></blockquote>Pretty sure yes. I've been using DCC for many years and know it pretty well, and sendmail like the back of my hand, I just couldn't get DCC with greylist working on my setup. Messages were bounced with "user unknown" which indicated local recipient
checks on the MX servers.<br><blockquote class="replbq" style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;">I watch my logs regularly and have never ever seen DCC cause a "user <br>unknown" error with a subsequent bounce to the sender. I have been <br>running DCC with greylisting enabled for the last two years now.<br></blockquote>Yes, I'm sure it works for people, all I'm saying is it didn't work for me. I spent two weeks trying to make a go of it before giving up with it.<br><br>I went to milter-greylist and had something in production the second day. It was straight forward to setup (and so is DCC) but gave me no trouble, it just worked.<br><br><blockquote class="replbq" style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;">> He's a cluely guy and knows his stuff, but I just couldn't get through <br>> to him, he simply didn't accept the setup I had as a valid setup. Go <br>> figure.<br>I have had
several Email exchanges with him. I agree with your <br>assessment but would add that he is just a stubborn guy who believes his <br>way is the only way. While I like DCC a lot if you indicate to Vernon <br>that you wish to use it in a different way than he envisioned you will <br>only get grief.<br></blockquote>:) I couldn't have put it better myself.<br><br>Cheers.<br><br>Michael.<br><blockquote class="replbq" style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;">-- <br>Paul (ganci@nurdog.com)<br><br>-- <br>MailScanner mailing list<br>mailscanner@lists.mailscanner.info<br>http://lists.mailscanner.info/mailman/listinfo/mailscanner<br><br>Before posting, read http://wiki.mailscanner.info/posting<br><br>Support MailScanner development - buy the book off the website! <br></blockquote><br><p> 
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