<div dir="ltr">By the way, if you'd prefer to take this off-list feel free to email me directly.<div><br></div><div>I'm happy to offer whatever help I can to get to the bottom of the problem, especially if it means proving some windows email admin wrong :)</div>
</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Sep 10, 2013 at 12:09 PM, L. V. Lammert <span dir="ltr"><<a href="mailto:lvl@omnitec.net" target="_blank">lvl@omnitec.net</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">On Tue, 10 Sep 2013, megadave wrote:<br>
<br>
</div><div class="im">> Well, I wouldnt say "send a postfix error" to the sender. I would use the<br>
> error message to determine what the problem is. (eg, "your hostname has no<br>
> DNS record", or "your hostname has an illegal character", etc) and then<br>
> tell them THAT.<br>
><br>
</div>"Invalid Hostname" or "Hostname not found" is tantamount to a Postfix<br>
error, .. "your hostname has no DNS record" may, or may not be a cause. It<br>
could be a "_", as mentioned, .. it could be no reverse DNS, ,.. it could<br>
be no MX record (!!), ..<br>
<br>
That's why I am looking for more definitive reasons FOR the erros that<br>
Postfix throws.<br>
<div class="im"><br>
> Perhaps there is some documentation for postfix that might explain what<br>
> that error means. I am used to SMTP servers that give specific information<br>
> when they log an error that identifies exactly what the cause is.<br>
><br>
</div>What sort of SMTP servers and sample errors? I have used Sendmail &<br>
Postfix, and the errors have always been similar to the ones mentioned.<br>
<div class="im"><br>
> I'm assuming you've done the basics and verified that the sender is sending<br>
> to the correct address, and that their email client is properly configured<br>
> with their valid sender address. Do you know if your server rejects ALL<br>
> mail from this sending server, or just from this one user?<br>
><br>
</div>The server is being rejected, ..<br>
<div class="im"><br>
> If you'd like to get more information about the SMTP transaction from this<br>
> problematic sender, I could setup a temporary address on a server under my<br>
> control, and you could have your sender attempt to email it. If mine<br>
> rejects it, I would be able to tell you exactly why. If it accepts it, I<br>
> may be able to provide details about the transaction that might help you<br>
> identify why your server is rejecting it.<br>
><br>
</div>As could I - what SMTP are you using that provides specific errors if not<br>
sendmail, Postfix, or perhaps smptd?<br>
<div class="HOEnZb"><div class="h5"><br>
Lee<br>
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