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

Can they telnet to your Exchange Server from their SMTP Server? You
didn't specify earlier whether it was workstation or from server.

If so, have them telnet to your mail server on port 25 and issue the
SMTP commands to send an e-mail to you. Servers will sometimes come back
with a message different than what they display on their bounce message.

To test, have your vendor issue the helo, mail from:, rcpt to:, and
data/quit commands as follows: (From their SMTP server console, if
possible)

Z:\>telnet $YOUR_EXCHANGEBOX 25

220 $YOUR_EXCHANGEBOX Microsoft ESMTP MAIL Service, Version: $VERSION
ready at  Tue, 30 Sep 2003 12:57:22 -0400
helo test
250 $YOUR_EXCHANGEBOX Hello [their.ip.addr.here]
mail from: their@xxxxxxxxxxxxx
250 2.1.0 their@xxxxxxxxxxxxxxxxxxxxxxx OK
rcpt to: your@xxxxxxxxxxxxx
250 2.1.5 your@xxxxxxxxxxxxx
data
354 Start mail input; end with <CRLF>.<CRLF>
Message data here. Plonk!
.
quit



-----Original Message-----
From: Vince Tan [mailto:VinceT@xxxxxxxxxxxx] 
Sent: Tuesday, September 30, 2003 11:00 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: OT:Exchange not getting certain email

From the looks of things, the DNS seems to be correct.  

Is there anything in exchange that might be blocking a particular
domain?

Thanks for any input

Vince

-----Original Message-----
From: Magnus [mailto:magnus@xxxxxxxx] 
Sent: Tuesday, September 30, 2003 10:06 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: OT:Exchange not getting certain email


Use the DNS checking utility on Miceandmen.com  It does a thorough check
of DNS and points out issues and how to fix them

-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On
Behalf Of Chris Lynch
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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Booth #24 at Citrix iForum on October 13th.
http://www.go-eol.com 
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http://www.go-eol.com 
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