Don,

I have this problem occasionally as well...even sending to domains like
microsoft.com, yahoo.com, etc.  After doing an nslookup on the domain and
then contacting our ISP, it usually tends to be a slow or faulty link
somewhere in the Sprint backbone between here and California.

Jim Blunt
Network / E-mail Admin
Network / Infrastructure Group
Bechtel Hanford, Inc.

-----Original Message-----
From: Milton R. Dogg [mailto:[EMAIL PROTECTED]] 
Sent: Wednesday, December 19, 2001 7:00 AM
To: Exchange Discussions
Subject: RE: Some system can not reache us


Dns problems.. Go play with Nslookup. Here are the basics.
http://support.microsoft.com/default.aspx?scid=kb;EN-US;Q203204
You may want to do some Whois on you and see where you name servers live.
Make sure they are being nice to you.

--
Dr. Milton R. Dogg   
Of the Dogg Foundation
 


-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]] On Behalf Of Don Bruess
Sent: Wednesday, December 19, 2001 6:57 AM
To: Exchange Discussions
Subject: Some system can not reache us


I have been trying to solve a problem that I am sure is simple and equally
sure it is beyond me.  I am running Exchange 5.5 with latest SP.

Everything seems to be fine except I find there are some servers (maybe 1 in
300), which do not deliver mail to us.  The sender gets an NDR which states
Host Not Found. This happens for incoming delivery only. Mail going out to
the same server works fine works fine.  I have tried working with the folks
at the other end but most of the time they are large ISP's and do not care
about not being able to reach one system.

Any suggestions would be great
[EMAIL PROTECTED]


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