Problem Description: Our company uses exchange server for
email n' outlook as its frontend.One particular email
address cannot be reached by any of the computers on our
network,while at same time when sent by a hotmail address
the email goes thro' and every time we send an email to
them it comes back giving the following error message:
The following recipient(s) could not be reached:
Unable to deliver the message due to a communications
The MTS-ID of the original message is:
MSEXCH:IMS:AUI:AUIMD:AUIEXCHANGE 3501 (000B09AA) 501 mail
not accepted from blacklisted IP address.
Could you pls explain why?