Exchange server que

[imapc]

Hi all!
I am sending an email to a company and when I send it it is getting hung in the que and when I click on it the message is, "The remote server did not respond to a connection attempt."

I have researched this and believe it to be related to DNS, however all of my lookups resolve my address and name fine. Also the NDR numbers on the return message is #4.4.7 see below;

Your message did not reach some or all of the intended recipients.

Subject: testing
Sent: 3/6/2009 9:45 AM

The following recipient(s) could not be reached:

test@xxxxusa.com on 3/8/2009 10:53 AM
Could not deliver the message in the time limit specified. Please retry or contact your administrator.
<mail.server.com #4.4.7>

This link gives a list of the ndr codes and meanings and it states #4.4.7 lies with the receiving servers connector.

http://www.computerperformance.co.u...03_NDR.htm#Interpreting the Exchange 2003 NDR

they are able to receive email from everyone but us, we have no problems with other people just them. We are not on a blacklist, I have done my dnsstuff.com also this is a good site too,

http://www.mxtoolbox.com/index.aspx.

I went to this site and did a diagnostics and blacklist check on my server and everything returned was good.

Unfortunately the other company of course is not cooperating and assumes that because they are getting other emails that the problem lies on my side.

Any help is greatly appreciated and I would like to be able to get this off my plate or be able to resolve this.

 

[noveyron]

Hi Manuel

Do you have a reverse DNS record in place? Try the reverse DNS check at AOL

http://postmaster.aol.com/tools/rdns.html

 

[imapc]

novyron,
thanks for the post! I tried the link you provided and, Success! I have done this as well on the links I posted and got the same results. I am really thinking that this is on their side but just can't be sure.

You got anything else on this?

thanks again,
Bryan

 

[noveyron]

Does telnet to the offending server work?

http://support.microsoft.com/kb/153119

 

[imapc]

I try to telnet into the ip and get no response, the screen goes black and then just goes back to C:

no response back like the article,
220 site.contoso.com Microsoft Exchange Internet Mail Connector <version number of the IMC>

 

[58sniper]

You're either getting blocked at their end or yours. But probably theirs. Probably connection filtering.

If you try telnetting TO that IP while on a DIFFERENT public IP than what you're trying now, do you get different results?

BTW - This would probably get more support posted in the Exchange 2003 forum.

Pat Richard MVP
Plan for performance, and capacity takes care of itself. Plan for capacity, and suffer poor performance.

http://www.ucblogs.net/blogs/exchange/

 

[imapc]

58sniper
thanks for the helpful post. I have not tried this from another location. However, I just got off the phone with the company hosting the mail server and they were able to telnet to my server from theirs,HOWEVER; he logged onto the server hosting the client's mail server that is not receiving the mail and was NOT able to connect and vice versa, I could connect to another server on the hosting network but not to the server hosting the mail for the company not receiving the mail. I tried a tracert to his mail server and the request just times out and goes no where. Is it safe to say that this is on their side?

Thanks again for the post.

 

[58sniper]

I'd say it's safe to assume the problem is that their end. Testing from another public IP address would give more credit to that assumption.

Pat Richard MVP
Plan for performance, and capacity takes care of itself. Plan for capacity, and suffer poor performance.

http://www.ucblogs.net/blogs/exchange/