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Exchange and POP 3 Problems

By k_glassel ·
I have recently acquired a new position where the servers NT 4.0 sp 4 (yes...only 4! :-(), Exchange 5.5 (loaded SP 4 recently). There were many issues with regards to Exchange (such as prior to loading SP4 it was reflect SP3 AND SP2! had to run admin /r to edit version to correct issue.)

The PROBLEM: POP 3 is having (and has been since I have been here in Jan.) intermittent connections issues where you cannot find the POP3 server through the Outlook 2000, or Outlook Express clients. (Suchas right now..I cannot telnet into the server, but we are receiving external mail and can send mail when 'internal' and not remote on the network.

If anyone has ideas...it would be very appreciated.

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Exchange and POP 3 Problems

by chris hirst In reply to Exchange and POP 3 Proble ...

The problem may be related to DNS resolution but without more info on your network setup (protocols etc) to be more specific would be difficult, as there are so many things that can upset Exchange even using different service packs on the server andadmin workstations can cause problems.

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Exchange and POP 3 Problems

by k_glassel In reply to Exchange and POP 3 Proble ...

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Exchange and POP 3 Problems

by k_glassel In reply to Exchange and POP 3 Proble ...

As for our network, we are TCP/IP, with an external ISP providing DNS. They have set up the MX for our POP3 mail (this has been setup for quite some time.) I can do a NSLookup and it returns the info. However, unless I am on the VPN for our network, if I am just using the ISP DUN, and trying to access our POP3 server, it is not finding the IP address. (Proxy / IIS is used in conjunction with Exchange in this scenario as well.)

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Exchange and POP 3 Problems

by k_glassel In reply to Exchange and POP 3 Proble ...

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Exchange and POP 3 Problems

by Dennis@l In reply to Exchange and POP 3 Proble ...

You could have one of several problems.
The proxy may not be configured correctly, but it sounds more like your domain is being hosted by an ISP and not registered with NIC. I would go to WWW.NIC.com and look it up. The record will show you who owns the domain and who/where is hosting the domain. I know you use nslookup and that is fine, and doesn't necessarily mean that it is properly configured and registered. I have also seen this happen when the MX record was not properly entered in the DNS record in correctly or the DNS record be out dated or the date format in the record doesn't match with the parent host.

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Exchange and POP 3 Problems

by k_glassel In reply to Exchange and POP 3 Proble ...

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Exchange and POP 3 Problems

by k_glassel In reply to Exchange and POP 3 Proble ...

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