Problems send to some Domains (Full Version)

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Smallguy -> Problems send to some Domains (1.Nov.2006 8:56:00 AM)

Hi everyone just recently we had  some users compalin that emails they are sending out are giving the following error



From: Admin
Sent: Tuesday, October 31, 2006 11:46 AM
To: End User
Subject: Delivery Status Notification (Delay)
This is an automatically generated Delivery Status Notification.
THIS IS A WARNING MESSAGE ONLY.
YOU DO NOT NEED TO RESEND YOUR MESSAGE.
Delivery to the following recipients has been delayed.
yourfriend@sympatico.ca


they also get the same error with 2 other domains but other's work fine.

the messages are  hung in the exchange Que and forcing the connection doesn't work

the people who are having the problem are using a different SMTP connector than the rest of the office because they have a different  email domain( prettysurethat is the right term.

but if not if I send and email  it works fine but my  email address is smallguy@abcinc.com and the people wth the issue are using  enduserr@xyz.com even though we are handling their email through a connector.

I'm not even sure where ot start with this because some emails do work(this does effect more than 1 user)

I've already  talked ot the admin of the other 2 doamins since they're sister companies and he can't see anything wrong on their server. whuchg also host some of the doamins we are able to send to

let me know where ot start as I do;nt mnid donig the leg work I'm jsut not sure where to begin.



Smallguy -> RE: Problems send to some Domains (1.Nov.2006 9:12:05 AM)

when I check the Queue I can see it is set ot remote deliervery  and  there  the properties shows the error below  


"The connection was dropped by the remote host"



jchong -> RE: Problems send to some Domains (1.Nov.2006 9:41:48 AM)

Perform a telnet to port 25 on the remote domains mail server, it usually gives an indication of why you cannot send to them. With delayed messages, it will either disconnect at the beginning, but some servers will report a reason.

1. Go to start run, type cmd ok
2. nslookup -type=mx theirdomain.com
note the fqdn of their mail server

telnet fqdnoftheirmailserver 25 (hit enter)
mail from:you@yourdomain.com (hit enter)
rcpt to:them@theirdomain.com (hit enter)
data (hit enter)
. (hit enter)
. (hit enter)

Should say message was queued.

Someone along this transaction it may fail of it was what part and what error?



Smallguy -> RE: Problems send to some Domains (1.Nov.2006 10:14:35 AM)

this is what I get on the nslookup

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.
C:\Documents and Settings\me>nslookup -type=mx icw-inc.com
*** Can't find server name for address 10.1.2.200: Non-existent domain
*** Can't find server name for address 10.1.2.210: Non-existent domain
*** Default servers are not available
Server:  UnKnown
Address:  10.1.2.200
Non-authoritative answer:
icw-inc.com     MX preference = 5, mail exchanger = mail.icw-inc.com
mail.icw-inc.com        internet address = 142.176.87.60


I tried ot telnet it itr is not working.... it did work earleir though



jchong -> RE: Problems send to some Domains (1.Nov.2006 10:43:08 AM)

>>I tried ot telnet it itr is not working.... it did work earleir though

Can you explain by it's not working? What part? Any error?



Smallguy -> RE: Problems send to some Domains (1.Nov.2006 10:47:46 AM)

I can now terlnet it

but get

220-clarkewebmail.com ESMTP MDaemon 9.5.2; Wed, 01 Nov 2006 11:42:11 -0400
220 "Welcome to the CLARKE Email System"
mail from:bernardm@armcocap.com
503 Unexpected command or sequence of commands
mail form: me@abdcorp.com
503 Unexpected command or sequence of commands
help ?
214 Help system currently inactive
mail from: me@abdcorp.com
503 Unexpected command or sequence of commands





Smallguy -> RE: Problems send to some Domains (1.Nov.2006 11:46:34 AM)

I tried telnetting again and was able to get to the data command but then it wouldn't get any further (I tihkn it was my error)
 
but now I can not telnet the server again. I caled the admin form there and he is looking into it because he can't telnet it either.

I used the instructions from
 
http://www.wikihow.com/Send-Email-Using-Telnet
 
 



Smallguy -> RE: Problems send to some Domains (1.Nov.2006 1:02:50 PM)

we changed the DNS servers  and it now works.... were were using the DNS from one of our other comapinies (we get internet from them) and we entered in  the DNS servers of the ISP suppling the internet connection ot our sister company.


thanks for the suggestions



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