Re: Exchange mail sending problem

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So your users can receive mail normally, both internally and externally.
They can send internally but not externally. Am I understanding you
correctly?

If so, this sounds like their SMTP settings in Outlook may be incorrect.
POP is the protocol that receives the mail, but all the outgoing mail is
SMTP whether it goes through Exchange or directly from Outlook. Usually,
ISPs have an incoming POP server such as "pop3.yourISP.com" and outgoing
SMTP server such as "smtp.yourISP.com" or "mail.yourISP.com." I wonder if
it's possible that you're trying to send mail to a POP server that is only
configured for mail retrieval.

I don't have any way to look at the settings from here, but if you go into
the Outlook profile somewhere under Tools -> E-mail Accounts, you should be
able to review the settings. For direct ISP accounts, there's a button to
test the configuration. If it fails, you should get some useful information
to fix the configuration.

I used the POP connector for years - way longer than I should have - but
always found it more reliable overall than when I had peer-to-peer with a
bunch of individual POP configurations on each desktop. FWIW, since I went
from POP to regular SMTP for everything, my mail problems and errors have
gone to pretty much zero. In fact, I have two old ISP POP accounts that I
still pick up with the connector, and those are just about the only source
of Exchange errors I ever see.


"gerryk" <gerryk@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:ADC3F00D-C46D-444F-BBD7-5AE2B719D0B9@xxxxxxxxxxxxxxxx
Hi Dave...
Thanks for the quick reply.
I'm afraid that didn't help however.
When I read through it, it looked pretty hopeful, especially method 2, as
the users weren't getting NDRs, but when I tried it, no joy.
Also, I found the POP3 connector to be unreliable, and so each client is
handling its own POP delivery direct to the ISP mail server. Basically,
exchange is just operating as a repository and shared calendar host at the
moment.
I do intend on migrating to hosting out own mail... probably sooner rather
than later, but in the interim, I have to try to find the solution to this
issue.
Any further suggestions would be greatly appreciated.

"Dave Nickason [SBS MVP]" wrote:

Any help here?

E-mail to external recipients with the same e-mail domain causes NDR
messages when using the POP3 Connector
http://support.microsoft.com/default.aspx?scid=kb;en-us;300681



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