<html><head></head><body bgcolor="#FFFFFF"><div>The external IP of an international Mailserver must have an DNS resolution and from my point of view also an valid Mx entry.</div><div>A reverse DNS should also be given.</div>
<div>For internal Subdomains masquerading to the main domain could also incr<br><br>Am 07.06.2012 um 19:02 schrieb Al Cooper <<a href="mailto:cooper@hmcnetworks.com">cooper@hmcnetworks.com</a>>:<br><br></div><div></div>
<blockquote type="cite"><div><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"><meta name="Generator" content="Microsoft Word 14 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoPlainText, li.MsoPlainText, div.MsoPlainText
{mso-style-priority:99;
mso-style-link:"Plain Text Char";
margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
span.PlainTextChar
{mso-style-name:"Plain Text Char";
mso-style-priority:99;
mso-style-link:"Plain Text";
font-family:"Calibri","sans-serif";}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><div class="WordSection1"><p class="MsoNormal">Hi All,</p><p class="MsoNormal"> </p><p class="MsoNormal">A few weeks ago my server’s emails sent from the postmaster user started to bounce with the following error message: </p>
<p class="MsoNormal"> </p><p class="MsoPlainText">The following addresses had permanent fatal errors ----- <user>@<a href="http://domain.com">domain.com</a></p><p class="MsoPlainText"> (reason: 553 5.1.8 <<a href="mailto:root@server.domain.com">root@server.domain.com</a>>... Domain of sender address <a href="mailto:root@server.doman.com">root@server.doman.com</a> does not exist)</p>
<p class="MsoPlainText"> (expanded from: <<a href="mailto:root@server.domain.com">root@server.domain.com</a>>)</p><p class="MsoNormal"> </p><p class="MsoNormal">It appears that my email is being blocked because there are not DNS records for the sub-domain <a href="http://server.domain.com">server.domain.com</a>.</p>
<p class="MsoNormal"> </p><p class="MsoNormal">If this is correct how do I change the postmaster sender address from <a href="http://server.domain.com">server.domain.com</a> to <a href="http://domain.com">domain.com</a>?</p>
<p class="MsoNormal"> </p><p class="MsoNormal">Or is there a better solution?</p><p class="MsoNormal"> </p><p class="MsoNormal">Thanks for your help,</p><p class="MsoNormal"> </p><p class="MsoNormal">Al </p></div><br>--
<br>This message has been scanned for viruses and
<br>dangerous content by
<a href="http://www.mailscanner.info/"><b>MailScanner</b></a>, and is
<br>believed to be clean.
<br>--
<br>This message has been scanned for viruses and dangerous content by the VPIsystems MailScanner.
</div></blockquote><blockquote type="cite"><div><span>-- </span><br><span>MailScanner mailing list</span><br><span><a href="mailto:mailscanner@lists.mailscanner.info">mailscanner@lists.mailscanner.info</a></span><br><span><a href="http://lists.mailscanner.info/mailman/listinfo/mailscanner">http://lists.mailscanner.info/mailman/listinfo/mailscanner</a></span><br>
<span></span><br><span>Before posting, read <a href="http://wiki.mailscanner.info/posting">http://wiki.mailscanner.info/posting</a></span><br><span></span><br><span>Support MailScanner development - buy the book off the website! </span><br>
</div></blockquote></body></html>