[THIN] Re: SV: Re: OT:Exchange not getting certain email

Thanks for the suggestion. The vendor's ISP actually tried the telnet
our mailserver and did get a connection.  That is why they kept
insisting that it is our exchange server that is blocking the email.  By
the way, the vendor is in Korea so everytime I ask them to try
something, it is a day later when I get a response.

Vince

-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] 
Sent: Tuesday, September 30, 2003 12:13 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] SV: Re: OT:Exchange not getting certain email


Just a shot in the dark... but i'll mention it anyway...

I had a problem sending mail from my company to a customer. After some
testing i found a route in my gateway router wich send all traffic to
the subnet on wich the remote mailserver resided to a dial-up port (wich
was not enabled at this time).

You can ask the people at the remote company to check the "cached
lookups" on the DNS server theyr mailserver is using, and see what MX
record they have for your mail domain. Also, if both your
Server/Firewall andt theyrs accept pings, try a ping/tracert from the
server wich sends the mail to the one recieving.

To check for domain blocking:
Do a telnet session to problem mailserver (the one wich the MX record
points at)

helo bs.com
mail from:bill.gates@xxxxxxxxxxx   (insert at adress from problem
domain)
rcpt to: your@xxxxxxxx                  Insert adress you want to
recieive mail to)
data
this is a testmail.
.
quit

This will send a mail to the server, you can use this to test if there
is a sending/routing or recieving problem.

Mvh
Svein Arild Haugum
Technical Leader, IT Dept.
Heidenreich AS, Norway.

-----Opprinnelig melding-----
Fra: Vince Tan [mailto:VinceT@xxxxxxxxxxxx]
Sendt: 30. september 2003 16:25
Til: thin@xxxxxxxxxxxxx
Emne: [THIN] Re: OT:Exchange not getting certain email


Chris, after looking around, the DNS record for my MX record looks
right, even the reverse DNS looks right.  I even use the name server of
ISP that my vendor is using and it points to the right ip address.  So
far, he still can't get through while I am able to receive from
everybody else.

Vince

-----Original Message-----
From: Chris Lynch [mailto:lynch00@xxxxxxx] 
Sent: Monday, September 29, 2003 6:59 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: OT:Exchange not getting certain email


I would agree that it is most likely a DNS problem.  It's most likely
related to your MX record, and not the DNS A host record.

I would do a simple NSLOOKUP using some online DNS lookup utility to
query for all MX records in your zone.

Chris 

-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On
Behalf Of Cochran, Ken
Sent: Monday, September 29, 2003 9:15 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: OT:Exchange not getting certain email

It is a DNS problem, I had the same problem a couple of weeks ago, and
received that same time out message.

        -----Original Message-----
        From: thin-bounce@xxxxxxxxxxxxx
[mailto:thin-bounce@xxxxxxxxxxxxx]
On Behalf Of Vince Tan
        Sent: Monday, September 29, 2003 12:08 PM
        To: thin@xxxxxxxxxxxxx
        Subject: [THIN] Re: OT:Exchange not getting certain email
        
        
        Yes they are able to ping and they were able to telnet to my
exchange server.  Weird part is that they don't have any problem sending
email to other people and I don't have problem receiving email from
other senders (as far as I know).
         
        Vince

                -----Original Message-----
                From: Higgins, Bob [mailto:BHiggins@xxxxxxxxxxxxxx] 
                Sent: Monday, September 29, 2003 11:52 AM
                To: 'thin@xxxxxxxxxxxxx'
                Subject: [THIN] Re: OT:Exchange not getting certain
email
                
                

                Can they ping your Exchange Server? Telnet to it? Sounds
like their problem, have them adjust their max connection time. 

                Bob Higgins, MCSE 
                Information Systems Server Administrator 
                Chinook Health Region 
                960 19th Street South 
                Lethbridge, Alberta 
                T1J 1W5 
                www.chr.ab.ca 
                Phone: (403) 382-6338 
                Fax: (403) 382 6046 
                E-mail: bhiggins@xxxxxxxxx 


                -----Original Message----- 
                From: Vince Tan [mailto:VinceT@xxxxxxxxxxxx] 
                Sent: September 29, 2003 9:43 AM 
                To: thin@xxxxxxxxxxxxx 
                Subject: [THIN] OT:Exchange not getting certain email 


                Just wondering if anyone can shed some light to this
mystery of mine. My exchange 2K server seems to be running fine but one
of our vendor can not get through.  Everytime they send an email to us,
they get "Recipient's server exceeded time for connection".  It seems to
be blocking their domain name but I can't find the block anywhere in my
system including firewall.  Any idea?

                Thanks for any input 

                Vince 
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