We have Intermittent problems sending and receiving email from one of our customers, sometimes email we send them they do not receive and sometimes email they send us we do not receive. However we have no other email problems such as this with any other customers.
It doesnt appear to be one particular recipient with our customers thats haveing problems, its any email recipient with that particular domain.
Anybody have any suggestions on how I could find out what could be causing the problem?, the customer thinks its not there problem and its a problem our end, but we think it could be a problem their end, either way id like to try to establish what could be causing the problem or at least prove its not a problem with our systems.
We use Outlook 2003 and SBS 2003. So far ive done the following:
I cheked our spam email system to see if any email has been blocked here instead but cant find any.
Checked to see if we or our customers are on any blacklists - neither of us are
ive used telnet to send a test email to our supplies email address and all seems ok - they recieved the email fine and i also got them to send me a test email using telent and i it seems to be fine - i recieved the email.
Also I used message tracking on the SBS 2003 server and looked to see if messages are passing through our emails server - All the emails from our supplier seem to reach our exchange server fine and messages are delivered to our email recipients inbox fine.
The sender (our supplier) has found an NDR email when they tried to email us which suggests they may have had NDR's before but just deleted them.
They emailed me the NDR and it says "Some or all of the recipient did not receive the message you submit" The recipient can not be served on the following:
WOO5UK-Bob Hedges (E-mail) at 4:41 pm 2008/5/28
You do not have permission to send the recipient. For assistance, please contact the system administrator
Write to: WOO5UK-Bob Hedges (E-mail)
Sent Date: May 28, 2008 Wednesday, 4:41 pm
Some or all of the recipient did not receive the message you submit.
Send date: 4:36 pm 2008/5/28
This suggets some kind of permissions set up on their server are causing the problems.
any suggestions?, is this likely to be a problem their end?