I&#39;ve never heard of those providers blocking by refusing connections, which makes me suspect it&#39;s not them doing it but someone in the path.<br><br>This is where tcptraceroute is your friend. Run &quot;tcptraceroute <a href="http://mx1.hotmail.com">mx1.hotmail.com</a> 25&quot; and see where the connections are actually being refused - my money is on it not being at the destination itself.<br>
<br>� Scott<br><br><br><br><div class="gmail_quote">On Thu, Mar 31, 2011 at 5:53 PM, Jodi Thomson <span dir="ltr">&lt;<a href="mailto:jodi@team.waspnet.co.nz">jodi@team.waspnet.co.nz</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div link="blue" vlink="purple" lang="EN-NZ"><div><p class="MsoNormal"><span style="color:#1F497D">Hi all</span></p><p class="MsoNormal"><span style="color:#1F497D">�</span></p><p class="MsoNormal"><span style="color:#1F497D">Am after some advice please.</span></p>
<p class="MsoNormal"><span style="color:#1F497D">�</span></p><p class="MsoNormal"><span style="color:#1F497D">We�ve recently taken possession of a shiny new IP block from APNIC � <a href="http://118.67.192.0/21" target="_blank">118.67.192.0/21</a> so that we can give our current IP�s back to our �upstream.</span></p>
<p class="MsoNormal"><span style="color:#1F497D">�</span></p><p class="MsoNormal"><span style="color:#1F497D">As part of the renumbering processes we�re taking the opportunity of building a new mail server as the old one is getting a little tired.</span></p>
<p class="MsoNormal"><span style="color:#1F497D">�</span></p><p class="MsoNormal"><span style="color:#1F497D">However we�ve run into a minor snag: The IP of our new mail server <a href="http://mta1.waspnet.co.nz" target="_blank">mta1.waspnet.co.nz</a> �118.67.193.2 and this being explicitly refused connection on port 25 to many of the major providers such as �Gmail, Excite and Hotmail � (In fact the entire range is but am only concerned with one at this stage)</span></p>
<p class="MsoNormal"><span style="color:#1F497D">�</span></p><p class="MsoNormal"><span style="color:#1F497D">Apr� 1 13:25:01 mta1 postfix/smtp[8807]: connect to <a href="http://gmail-smtp-in.l.google.com" target="_blank">gmail-smtp-in.l.google.com</a>[72.14.213.27]: Connection refused (port 25)</span></p>
<p class="MsoNormal"><span style="color:#1F497D">Apr� 1 13:25:01 mta1 postfix/smtp[8807]: connect to <a href="http://alt1.gmail-smtp-in.l.google.com" target="_blank">alt1.gmail-smtp-in.l.google.com</a>[74.125.67.27]: Connection refused (port 25)</span></p>
<p class="MsoNormal"><span style="color:#1F497D">Apr� 1 13:25:01 mta1 postfix/smtp[8807]: connect to <a href="http://alt2.gmail-smtp-in.l.google.com" target="_blank">alt2.gmail-smtp-in.l.google.com</a>[74.125.47.27]: Connection refused (port 25)</span></p>
<p class="MsoNormal"><span style="color:#1F497D">Apr� 1 13:25:01 mta1 postfix/smtp[8807]: connect to <a href="http://alt3.gmail-smtp-in.l.google.com" target="_blank">alt3.gmail-smtp-in.l.google.com</a>[74.125.113.27]: Connection refused (port 25)</span></p>
<p class="MsoNormal"><span style="color:#1F497D">Apr� 1 13:25:01 mta1 postfix/smtp[8807]: connect to <a href="http://alt4.gmail-smtp-in.l.google.com" target="_blank">alt4.gmail-smtp-in.l.google.com</a>[209.85.229.27]: Connection refused (port 25)</span></p>
<p class="MsoNormal"><span style="color:#1F497D">Apr� 1 13:25:01 mta1 postfix/smtp[8808]: connect to <a href="http://mx2.hotmail.com" target="_blank">mx2.hotmail.com</a>[65.55.92.184]: Connection refused (port 25)</span></p>
<p class="MsoNormal"><span style="color:#1F497D">Apr� 1 13:25:01 mta1 postfix/smtp[8808]: connect to <a href="http://mx1.hotmail.com" target="_blank">mx1.hotmail.com</a>[65.54.188.110]: Connection refused (port 25)</span></p>
<p class="MsoNormal"><span style="color:#1F497D">Apr� 1 13:25:01 mta1 postfix/smtp[8808]: connect to <a href="http://mx2.hotmail.com" target="_blank">mx2.hotmail.com</a>[65.54.188.126]: Connection refused (port 25)</span></p>
<p class="MsoNormal"><span style="color:#1F497D">Apr� 1 13:25:01 mta1 postfix/smtp[8808]: connect to <a href="http://mx4.hotmail.com" target="_blank">mx4.hotmail.com</a>[65.54.188.110]: Connection refused (port 25)</span></p>
<p class="MsoNormal"><span style="color:#1F497D">Apr� 1 13:25:01 mta1 postfix/smtp[8808]: connect to <a href="http://mx3.hotmail.com" target="_blank">mx3.hotmail.com</a>[65.54.188.126]: Connection refused (port 25)</span></p>
<p class="MsoNormal"><span style="color:#1F497D">�</span></p><p class="MsoNormal"><span style="color:#1F497D">Other providers such as TCL are just timing out on the connection attempt</span></p><p class="MsoNormal"><span style="color:#1F497D">/var/log/maillog:Mar 29 08:27:29 mta1 postfix/smtp[28902]: connect to <a href="http://mx.clear.net.nz" target="_blank">mx.clear.net.nz</a>[203.97.33.212]: Connection timed out (port 25)</span></p>
<p class="MsoNormal"><span style="color:#1F497D">�</span></p><p class="MsoNormal"><span style="color:#1F497D">Telnet to port 25 produces the same results</span></p><p class="MsoNormal"><span style="color:#1F497D">�</span></p>
<p class="MsoNormal"><span style="color:#1F497D"> Yahoo interestingly isn&#39;t blocking it and other a few other providers are letting us through</span></p><p class="MsoNormal"><span style="color:#1F497D">�</span></p><p class="MsoNormal">
<span style="color:#1F497D">The frustrating thing for me is that once I got SPF &amp; rDNS sorted we �had full connectivity to all of these on the 17<sup>th</sup> &amp; 18<sup>th</sup> March. Then on the 19<sup>th</sup> we started to be blocked again.</span></p>
<p class="MsoNormal"><span style="color:#1F497D">�</span></p><p class="MsoNormal"><span style="color:#1F497D">I�ve filled in online forms with the big three to no avail. I&#39;ve checked SORBS, Senderbase, etc and I can see no reason why we should not get through. Any suggestions/assistance as to what I can try next would be greatly appreciated.</span></p>
<p class="MsoNormal"><span style="color:#1F497D">�</span></p><p class="MsoNormal"><span style="color:#1F497D">We�re currently using it for sending <a href="http://team.waspnet.co.nz" target="_blank">team.waspnet.co.nz</a> mail</span></p>
<p class="MsoNormal"><span style="color:#1F497D">�</span></p><p class="MsoNormal"><span style="color:#1F497D">Cheers</span></p><p class="MsoNormal"><span style="color:#1F497D">Jodi</span></p><p class="MsoNormal"><span style="color:#1F497D">�</span></p>
<p class="MsoNormal"><span style="color:#1F497D">PS � We also have an IPv6 block which I am waiting upstream advertisement</span></p><p class="MsoNormal"><span style="color:#1F497D">PPS � There will be beer </span><span style="font-family:Wingdings;color:#1F497D">J</span><span style="color:#1F497D"></span></p>
<p class="MsoNormal">�</p><p class="MsoNormal"><b><i><span style="color:blue">Jodi Thomson������� </span></i></b><b><i><span style="font-size:12.0pt;color:blue"></span></i></b></p><p class="MsoNormal"><span style="font-size:9.0pt">Network &amp; Systems Engineer</span><span style="font-size:9.0pt"></span></p>
<p class="MsoNormal"><img src="cid:image001.jpg@01CBF074.33B00F80" alt="Description: Wasp New Zealand" height="57" width="104"><span style="font-size:9.0pt"></span></p><p class="MsoNormal"><span style="font-size:9.0pt">Ph������������������������� � +64-6-8355800� </span><span style="font-size:9.0pt"></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt">Fax������������������ �������+64-6-8355811</span><span style="font-size:9.0pt"></span></p><p class="MsoNormal"><span style="font-size:9.0pt">Mob����������������������� +64-21-903712</span></p>
<p class="MsoNormal"><span style="font-size:9.0pt">E-Mail�� <a href="http://jodi@team.waspnet.co.nz" target="_blank"><span style="color:blue">jodi@team.waspnet.co.nz</span></a></span></p><p class="MsoNormal"><span style="font-size:9.0pt"><a href="http://www.waspnet.co.nz/" target="_blank"><span style="color:blue">www.waspnet.co.nz</span></a> </span></p>
<p class="MsoNormal">�</p><p class="MsoNormal"><span style="color:#1F497D">�</span></p><p class="MsoNormal">�</p></div></div><br>_______________________________________________<br>
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