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aiplaFlag for United States of America

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Exchange 2003, Can receive email, but cannot send email from outside the office

I am running Exchange 2003 sp 2 on Windows 2000 sp4 OS. When I am outside the office I can receive email, but I cannot send. I get the following generic error: Task 'mail.aipla.org - Sending' reported error (0x800CCC0F) : 'The connection to the server was interrupted.  If this problem continues, contact your server administrator or Internet service provider (ISP).'  This has been going on for about 2 months now. I tried to telnet from my home to my Exchange server and had no luck. Also, when I tried to telnet from the exchange server, I had no luck.

Everything works fine when I am in the office. I have asked others to check from their homes using a different ISP and they are having the same problems.

Any thoughts/suggestions would be greatly appreciated! Thanks.
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elbereth21
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Hi aipla,
since you cannot telnet to the Exchange server, there seems to exist a possible problem with firewall configuration or an IP filter on the addresses of the computers allowed to relay mail through Exchange.
Anyway, have you already seen this article?
http://support.microsoft.com/kb/813514

Elbereth.
Are you using Outlook as an Exchange client or as a POP3/SMTP client?
If it is the latter, then the question you have to ask is why? As you are on Exchange 2003 the preferred remote access method is RPC over HTTPS. This gives you full access to the features of Exchange and also means you are not attempting to relay email through your Exchange server over the internet.

The error message certainly indicates that something is either blocking or disrupting the connection. SMTP over the internet to your Exchange server for relaying email is not something that can be relied upon. Many ISPs block SMTP traffic from their networks, and you have to use their SMTP server to send email. You can get round this by using a VPN.

Simon.
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ASKER

The SMTP part of the POP3 client does NOT work when I use VPN, but the Exchange client does. I am not running any third part firewall on this system and the SMTP connection broke months after the IE patch in April 2006 (referencing the suggestions by Elbereth). I am not familar with telnet, but do think it's unusual that I can't telnet to my exchange server and from my exchange server. Is there a way you can check to see whether or not my settings are correct?
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Sembee
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