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I have exchange with sp2. Some (not all)external emails are not being delivered. They are to different domains as well - so no link there. Anyway when the email is sent the following day the sender will receive the delay message and the day after that they will get the following message: Your message did not reach some or all of the intended recipients. Subject: Contract 1/119 - Tech Query RYTQF008 Sent: 20/12/2001 16:20 The following recipient(s) could not be reached: npd@mm-mose.mottmac.com on 22/12/2001 16:24 Could not deliver the message in the time limit specified. Please retry or contact your administrator. <XXX.XXX #4.4.7> (obviously I have replaced our domain name with XXX.XXX) Anyway according to the MS website error 4.4.7 means: Numerical Code: 4.4.7 Possible Cause: The message in the queue has expired. The sending server tried to relay or deliver the message but the action was not completed before the message expiration time occurred. This message can also indicate that a message header limit has been reached on a remote server or some other protocol timeout occurred while communicating with the remote server. Troubleshooting: This message usually indicates an issue on the receiving server. Check the validity of the recipient address, and determine if the receiving server is configured to receive messages correctly. It may be necessary to reduce the number of recipients in the header of the message for the host to which you are receiving this error. If you resend the message, it is placed in the queue again. If the receiving server is up, the message is delivered. Using NSlookup on the domains gets the correct response. Basically I need to know whether it it our fault with exchange or the other domains (as microsoft suggest) If it is our side is there a fix..
Many thanks in advance
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