wrote:
Hello, I have created a distribution list with 82 contacts. When I
send mail to this DL some recipients receive more than one mail, 2
or 3 copies of same mail. I'm sure that in DL there isn't double
recipients!
Are the recipients who get duplicate messages internal to your
Exchange server or external?

No are external... thx.

I'm tempted to point the finger at Exchange, when it comes to further
troubleshooting.

Assuming that the only messaging service in your profile is the
Exchange server, in other words, no POP3/IMAP/WebMail services are
configured, all mail to the Internet is going to go through the
Exchange server.

Since you've said you've verified that people are not in the DL more
than once (and I'm going to assume that:
a) You do not have any nested DLs in your DL where a user may be
listed in both DLs
-and-
b) You've verified that the people gettting multiple copies are
getting them at the same address) you may want to talk to the
Exchange administrator about turning on message tracking and SMTP
logging to verify that there is only a single message being sent to
a particular address.

I'd also verify a few things:
1) Can you reproduce the problem if you send to a recipient who
reported the problem individually? In other words, don't use the
DL, just mail them via the contact. See what happens. Pick them
out of the Contact list just like you pick the DL.
2) Does the recipient reporting the problem *always* see the
problem or is it transient? Sometimes User X gets multiples,
sometimes User Y.

Now, all that said, if you *do* have a POP3/IMAP/WebMail service set
up in your profile, are you sending to these users via it, or is it
via the Exchange Server?

After some checks: verify the tracking message, smtp log etc, I read
your last rows and I verify the service enable on the user account
that have the problem, and ... he has all three service enable POP3/
IMAP/WbMail. This what can cause? Can you explain to me? Do you think
that this is the problem? At least the POP3 and IMAP service they do
not serve to us, BUT the WebMail service yes because this users it
must be able to read mail also when is outside office!!! I'm wainting
you answer!!! Thx!

Ah, sorry, I think you misunderstood. I meant in the Outlook profile on the
client, are they only configured to access the Exchange server, or might
they be configured to access pop3/imap/webmail servers as well?

The fact that in Exchange the user is permissioned to access the server in
multiple formats is not the cause. And, to be honest, if the client is
configured to use a server other than Exchange, it is unlikely to cause the
problem but it makes troubleshooting the problem different. That's the
reason I asked.

Was SMTP logging enabled on the server before?

--
f.h.