[afnog] exchange 2003 can't send out emails!

[Arbogast Fabian]

thanks all gurus,
 
very funny .....the issue was missing DNS entries on the NIC configuration for some reason.....although it was resolving, surfing, connecting to port 25, sending email to few domains e.t.c
 
for curiosity we just checked the network configuration and found DNS entries missing....after putting them back mails just kicked out of the box......
 
we could not imagine that it was such an issue since it was resolving and all that......
 
but it seems it was using DNS (local) entries and forwarders in the DNS Configuration files (entries) but for some reason it could not use the same entries for forarding outside email..
 
 
the we sorted out the problem last evening.....
 
thanks every one for advise and support.
 
Fabian
 


From: auwudia at swifttalk.net
To: afabbie at hotmail.com; afnog at afnog.org
Subject: RE: [afnog] exchange 2003 can't send out emails!
Date: Wed, 4 Aug 2010 15:54:32 +0100






Hi Fabian,
It sounds like the issue is with your ISP. If you have been sending out mails from the server before now and it just suddenly stop, it is most likely that some things have changes at your provider’s end.
 
For instance, I once replaced a box on my network (CacheBox – www.appliansys.com) and forgot to add the access control list (ACLs) that defines the IP subnet of my network. All my customers that have exchange server complained about the same issue as you have now. They could telnet to external mail servers on port 25 etc, they could browse, but they were unable to send emails. The issue persisted until we recreated the ACLs.
 
Check things up with your ISP – that is if you are sure you have not made any configuration changes in error.
 
Thanks and regards,
 

Austin Uwudia
www.swifttalk.com
 


From: afnog-bounces at afnog.org [mailto:afnog-bounces at afnog.org] On Behalf Of Arbogast Fabian
Sent: Wednesday, August 04, 2010 2:01 PM
To: afnog at afnog.org
Subject: [afnog] exchange 2003 can't send out emails!
 
dear gurus,
 
strange my exchange 2003 has stopped sending out emails!...
 
i can send to few domains e.g netsec.co.za and cnet.co.tz delivery delay message just says it will keep on sending.......
 
sitting on exchange 2003 i can ping, resolve, connect to port 25 on outside mxs, surf e.t.c
 
emails from outside are coming i have check for black-lists my IP is not listed.
 
my domain is mdh-tz.org with mx= mhmail.muchs-harvard.org 
 
any clues pls ?
 
thank you,
 
Fabian 		 	   		  
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