Perplexing Exchange Problem between 2 SBS Sites

From: Victor (victor_at_yahoonomail.com)
Date: 12/12/04 

Date: Sun, 12 Dec 2004 17:07:20 -0500

I manage 2 sites for one company, a main office and a branch office. Main
Office has SBS 2000. Branch office has SBS 2003 Standard.

Domain name for main office is companymain.com
Domain name for branch office is companybranch.com
Both sites can send and receive email using SMTP from any domain ok with one
big exception.

Companybranch.com mail sent to Companymain.com usually, but not always(9 out
of 10 times), does not arrive. Occasionally it will arrive after a delay of
an hour or so. Very rarely it will arrive promptly (1 in 50).
NDR's said 4.4.7.until Microsoft support recommended turning off NDR's.

Companymain.com mail sent to Companybranch.com always arrives promptly
(usually within seconds).

Main office ISP is Bellsouth DSL
Branch Office ISP is a local wireless ISP due to the remote site.

This problem showed up after I converted the main office to direct SMTP mail
from using a Global POP3 Connector to our website domain (companymain.com)
hosting company's (Verio) POP3 server.

MX and A record changes were made to point SMTP mail to the Main Office SBS
Server. These were successful as all mail except for mail from
companybranch.com is received and sent promptly.

I spent 6 hours with Microsoft Tech Support on Friday. They checked both
servers remotely. They disabled the default SMTP Virtual server on both
servers and recreated them in case they were corrupt.

I tried sending the outgoing Companybranch.com email through the wireless
ISP's smart host after discussing the problem with their tech. That made no
difference good or bad so I reverted to the settings recommended by
Microsoft.

 Microsoft Support said to call back if the problem continued so I will do
that but even they were perplexed.

Anyone had a similar problem receiving mail from between 2 SBS sites?

Thanks,

Victor

Relevant Pages

  • Re: The list of servers for this workgroup is not currently availi
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    ... I understand that after you installed SP1 on the SBS ... 2003 Server, the branch office can no longer access the internet. ...
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  • Re: SBS to SBS VPN
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  • RE: SBS 2000/2003 POP3 Connector & Multiple Sites
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  • Re: Backup DC
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