You lost me. Which DNS settings do you want me to check? Out of the 100 users on this Exchange Server there are three that can't receive messages. 3 out of 100 would be some kind of DNS issue?
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Exchange Server 2003 - No Such User
I have an Exchange Server 2003 that has developed a problem with a couple users. When someone sends and e-mail to them it bounces with:
(TCP|206.46.173.5|50968|64
The users exist in the AD and I have verified their e-mail address. As a side note I just added myself as a user and created my Exchange Mailbox. I can send to it internally but get the same bounce message when I try and send to it externally and this was a fresh add!
Help!!!!
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Answers
Oh right - you didn't say that at the beginning :-)
No - if this problem is only affecting 3 users then it won't be DNS related. It is probably related to the SMTP email address settings within the User Properties of the three users affected. You can view these by going into the Active Directory Users and Groups and browsing to the user properties of one of the three affected users.
From there you need to view the Exchange properties tab. At the bottom of the tab page you will see a list of email addresses. There should be at least one X400 address and then an SMTP address which will be the external address. If the SMTP address is missing, voila.
Regards,
Ady
That was one of the first things I did. I added myself as a AD user. Then checked the auto-generated Exchange E-Mail addresses. There is one SMTP (which is correct) and one X400. Everything looks fine. I can send e-mail to that address internally but it bounces when I send to it externally.
I thought this was odd because it was a fresh addition to the AD. I have looked through several e-mail addresses of ones that are working and they all look the same. In addition to my AD addition which bounces there are two existing users that bounce. No errors in the event viewer. Nothing.
Something on these three users is generating a "no such user" bounce message when they are e-mailed externally ...
Just to keep you in the loop with my investigation. This seems to be a problem that is not being caused by your Exchange Server. Exchange doesn't respond to errors with psmtp messages. Try and email, externally, a user on your system that you know doesn't exist - you will get a very different message back than the one you have quoted in your post.
Regards,
Ady
Have you tried emailing these three accounts from various external sources and, if so, do you get the same issue?
Postini is an external solution which filters from viruses and spam so you wouldn't see it on the server but the DNS settings (MX records) would show this. You need to look up the domain records for the external domain and see where the MX record is sending mail.
Regards,
Ady
OK - this is nothing to do with the server at all. It is everything to do with the setup of your client's domain.
The MX records for the domain show this:
;; QUESTION SECTION:
;gsmetalinc.com. IN MX
;; ANSWER SECTION:
gsmetalinc.com. 3600 IN MX 10 gsmetalinc.com.s6a1.psmtp.
gsmetalinc.com. 3600 IN MX 20 gsmetalinc.com.s6a2.psmtp.
gsmetalinc.com. 3600 IN MX 30 gsmetalinc.com.s6b1.psmtp.
Without wishing to insult your intelligence this means that the mail for the domain is being stored firstly at one of the three servers above that are provided by PSMTP.com. This is a service that will be provided for a fee so someone at the company who owns the server will know about this. Postini provides a filtering and anti-virus service but needs to be informed of users registered to the domain otherwise it rejects the mail (as you're getting here).
To resolve this issue you will need to access the Postini service configuration for the domain. I don't know a great deal about Postini but you might find more information at http://www.google.co.uk/po
Good luck! I think this question can now be closed.
Regards,
Ady
You're very welcome. I believe it is a simple case of logging onto Postini and adding the users who are not receiving external mails to the list of approved users. Then you're good to go.
The following link should help explain:
http://www.google.co.uk/po
Regards,
Ady
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by: afootPosted on 2009-09-27 at 12:40:57ID: 25435173
Check the external domain DNS settings to make sure that they're pointing to the correct mail server. That's the first thing I would do before looking at the Exchange setup.
Regards,
Ady