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Can you go over the symptoms again? Getting confused J I
thought it was a reply only issue below: When we send a mail to the domain it arrives ok, but users
can not reply to our message. They keep getting the 4.4.7 NDR with message
delayed and then timeout. Or is it that you cannot send to this particular external
domain at all? James Chong 11130 Sunrise Valley Drive, Suite 300 Reston, VA 20191 From:
exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On
Behalf Of Patrick I am not quite sure that is the case here, cos we can
recieve from the other side, but can not send, and we can send and recieve from
everyone else. The only pointer here is that we all share the same ISP. So we
suspect they have done something they are not telling us. This is the story. The other site chose to stop using our
ISP for mial filtering as this was too expensive and chose to have it in house.
Every since that service was disable, this problem started. I think they might
have setup up some sort of static route between the 2 sites which isnt quite
right. but that is only a guess, as they claim all is well @ thier end.
----- Original Message ---- do u have reverse DNS configure,some mail server will not accept ur mail if
u do not have that , like aol e.t.c pls have ur ISP or if u have the admin right to do it .pls try this . regards ----- Original Message ---- smtp port 25 is not blocked, cos we can send to other
domains and receive. And according to the logs from ISA, an smtp connection is
established ----- Original Message ---- check the firewall for smtp 25 port ,guess is block some
where .. try and run SMTPdiag. cheers
----- Original Message ---- Can you try whitelisting this domains IP to isolate the issue? James
Chong Sr.
Systems Engineer Simplexity,
LLC. 11130
Sunrise Valley Drive, Suite 300 Reston,
VA 20191 O
(703) 657-4612 C
(703) 863-1483 From: exchangelist-bounce@xxxxxxxxxxxxx
[exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of James Chong This domain cannot reply to your companys messages, but they can
send a new message? I have heard of this before with the reply issue but
don't recall a resolution. Let me research. James
Chong Sr.
Systems Engineer Simplexity,
LLC. 11130
Sunrise Valley Drive, Suite 300 Reston,
VA 20191 O
(703) 657-4612 C
(703) 863-1483 From: exchangelist-bounce@xxxxxxxxxxxxx
[exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Patrick [london31uk@xxxxxxxxx] Hi Guys, any input on this would be greatly appreciated. We can telnet the smtp relay
box, but nothing seems to get through. everyone seems to think this is not
thier problem. Somehow we feel it is the ISP's but they are not taking
responsibility for this. Any Ideas please ----- Original Message ---- Hi, Someone recommended we do the following. Not quite sure this does. Please
advice Turning off EDNS-0 extended UDP packets in W2k3 server's DNS.
(EDNS0 as defined in RFC 2671) Server 2003's DNS server has a new capability, it can handle UDP packets
greater than 512 bytes. Unfortunately some firewalls cannot pass these packets
so it is desirable to have the DNS server fall back to TCP in this case as it
used to do in previous versions of NT DNS. To turn off the EDNS-0 feature run this from a command prompt: dnscmd /Config /EnableEDnsProbes 0 Once you run this your W2K3 DNS server will never advertise its EDNS
capabilities and so will never receive a UDP packet > 512 bytes. dnscmd.exe can be found in the Support Tools. To install Windows Support Tools
For complete setup information, refer to the
Readme.asp file available in this folder.
----- Original Message ---- If your able to receive and send mails through other domains…still
you need to have a look at the below points. Network connectivity issues you can check using trace route to the
problematic domain. Find out with remote domain administrator if your domain has block
listed in there Database Try telnet from your exchange server to Remote domain (C:\telenet problemdomain.com 25 )
From: exchangelist-bounce@xxxxxxxxxxxxx
[mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Patrick Should this be done on mine server though? eveb though I can
send and recevie from other domains and can send to the problematic domain, but
can not receive Thanks ----- Original Message ---- Hi, Please have a look at the below, it can be any of the below issue. 1) Network
connectivity issues 2) You might
be blocked by Remote server 3) Try to
telnet 25 to the remote server and see what the response you can see? 4) Do you use
ISP Smart Host for delivering Emails or you got own SMTP server? 5) Finally
Check the DNS. ( check FQDN is valid for SMTP Virtual server) If the issue will not resolve please increase the Diagnosis logging
for MSExchange Transport. Cheers!!! Prabhu
From:
exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On
Behalf Of Patrick Hi guys, Not quite sure why this is happening. But we can send emails
to people ok, but we are having problems from a particular domain. Other
domains can send to us ok. When we send a mail to the domain it arrives ok, but users
can not reply to our message. They keep getting the 4.4.7 NDR with message
delayed and then timeout. If anyone can point us in the right direction it would be
helpful, cos a lot of steam and trouble is brewing over this. Windows 2003 Domain, Exchange 2003 SP2. Mail Marshall for
filtering. Thanks Be a better friend, newshound, and know-it-all with Yahoo!
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