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I'm fairly sure (as a friend has just confirmed he had this issue) that AOL - in the UK at least - block port 25 for anti-spam purposes.<br />
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Check these URLs:<br />
<br />
<a href="http://postmaster.aol.com/cgi-bin/whitelist/whitelist_guides.pl" rel="ugc">http://postmaster.aol.com/cgi-bin/whitelist/whitelist_guides.pl</a><br />
<br />
<a href="http://www.no-ip.com/services/managed_mail/outbound_port_25_unblock.html" rel="ugc">http://www.no-ip.com/services/managed_mail/outbound_port_25_unblock.html</a><br />
<br />
Hope this helps!
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I'm fairly sure (as a friend has just confirmed he had this issue) that AOL - in the UK at least - block port 25 for anti-spam purposes.

Check these URLs:

http://postmaster.aol.com/cgi-bin/whitelist/whitelist_guides.pl [http://postmaster.aol.com/cgi-bin/whitelist/whitelist_guides.pl]

http://www.no-ip.com/services/managed_mail/outbound_port_25_unblock.html [http://www.no-ip.com/services/managed_mail/outbound_port_25_unblock.html]

Hope this helps!

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Does it matter what port number I change it to? &nbsp; I was thinking 2525. &nbsp; Also, is it as simple as going into default smtp settings and changing it from 25 to 2525?
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Does it matter what port number I change it to?   I was thinking 2525.   Also, is it as simple as going into default smtp settings and changing it from 25 to 2525?

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it appears that you cannot change exchange from port 25 and still be able to send email
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it appears that you cannot change exchange from port 25 and still be able to send email

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We have recently moved are email from a hosted server to our own running Exchange 2003. &nbsp; &nbsp;The only problem we seem to have is that AOL is blocking any emails sent from our server. &nbsp; &nbsp;I have read that we need to setup a reverse dns record. &nbsp; Where (and how) do we do that? &nbsp; Would it be on our server, via godaddy, or via our ISP which is AT&amp;T?
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We have recently moved are email from a hosted server to our own running Exchange 2003.    The only problem we seem to have is that AOL is blocking any emails sent from our server.    I have read that we need to setup a reverse dns record.   Where (and how) do we do that?   Would it be on our server, via godaddy, or via our ISP which is AT&T?

reverse lookup and AOL blocking our exchange email

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.