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neomage23Flag for United States of America

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Exchange POP3 and ISA2k4 - Can receive mail over pop3 but can't send...

Hey Experts...

Just like the title says...got an exchange server published behind ISA server, set up publishing rules for POP3...can connect and receive easily enough, but can't send...

sleepy, and out of ideas...

What do you guys (or gals) think?

-neo
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rhettlee

What error does it say?

Another thing is when you telnet to interface of the ISA server where the Exchange using port 25 is published can you connect to it?
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Where is your SMTP server defined ?
Did you also published SMTP server using ISA publishing rule  ?

follow the link below
http://support.microsoft.com/default.aspx?scid=kb;en-us;287646&Product=exch2003
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rhettlee:

I'm getting this error from an outlook express client:

The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was 'myname@hotmail.com'. Subject 'tset from cpser', Account: 'myserver.mydomain.com', Server: 'myserver.mydomain.com', Protocol: SMTP, Server Response: '550 5.7.1 Unable to relay for myname@hotmail.com', Port: 25, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC79

I can telnet to port 25 from within my office (LAN) and from a dedicated server that we have through a hosting company, but the odd thing is that I can't telnet to port 25 from my home (cox.net cable inet). The above message is from the outlook express client on the dedicated server.


ikm7176:

SMTP seems to be working fine, I'm not getting any denied connection errors within the ISA logs. I used this guide to publish my exchange 2003 server....

http://www.microsoft.com/technet/prodtechnol/isa/2004/plan/exchage2003.mspx

How should relaying be configured?

-neomage
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ikm7176
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ikm:

it is set up that way...under Default SMTP Virtual Server Properties....Access....Relay Restrictions...

The setting is set to "only the list below" ... the only domain that is granted is "mycompany.com" and there is a check next to "Allow all computers which success authenticate...."

Ugh...I hate it when I can't figure things out.

-neo
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