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Exchange error?

Posted on 2002-07-08
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Last Modified: 2010-03-05
when I send a message to the following recipient I get this error message:

Your message did not reach some or all of the intended recipients.

      Subject:     test
      Sent:     7/8/2002 4:20 PM

The following recipient(s) could not be reached:

      John Radulovich on 7/8/2002 4:20 PM
            Unable to deliver the message due to a communications failure
     The MTS-ID of the original message is: c=US;a= ;p=Mackenzie Wareho;l=MACK_PDC_01-020708232003Z-859

Is this due to an error in our Exchange Server, or does it have to do with the recipient's ISP servers?

Thank you

LuisP
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Question by:LuisP
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5 Comments
 
LVL 9

Expert Comment

by:schmiegu
ID: 7143033
Unless your Exchange Server is directly connected to the Internet, the problem is somewhere between your mailbox store and your ISP. This can be a misconfigured SMTP Connector, or a misconfigured firewall, a DNS problem, dial-up line....
(Since you mentioned ISP, I believe, this is a message sent over the Internet).
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LVL 1

Author Comment

by:LuisP
ID: 7143790
Why would the problem be only on two recipients that have pacbell.net as their ISP only?
I am able to send mail to everyone else. I do not understand.
Thank you,

LuisP
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Accepted Solution

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schmiegu earned 200 total points
ID: 7145402
Some possible reasons:

DNS-Problem (wrong MX-record)
SMTP-Server down
SMTP-Server requires authentication
SMTP-Server performs reverse lookup and can't find your server

The problem is, there isn't a SMTP-Connector Log, that shows the communication between the servers (at least I didn't find it till now) like Exchange 5.5 and other SMTP-Servers.

Try to telnet the server in question and try to send a mail manually. If you don't know how to send a mail via telnet, search http://search.support.microsoft.com/kb/c.asp?FR=0&SD=TECH
for Q153119.

This should help to break the problem down.
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LVL 1

Author Comment

by:LuisP
ID: 7146728
schmiegu,

    If our seerver requires authentication, how do we set it up?.
    This is all new to me, I am not very familiar with Exchange and everything else that needs to be done to configure it.
    Thank you for your help.

LuisP
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LVL 9

Expert Comment

by:schmiegu
ID: 7146780
I didn't mean your server, but the server you're trying to connect to.

In most cases it's not a good idea, to require authentication on a SMTP-server. You could configure this in the properties of your Virtual SMTP server in Exchange System Manager.

To configure outbound security you have to go to your Connector and configure this to negotiate authentication (I never had to do this and I believe you had to create a new connector, that only routes mail for the specific domain).
I'd first try telnetting the server, you have problems with.
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