When sending e-mail to gmail accounts, the message will stay in the queue. The user recieves a Delayed message and then after some time the message will fail and the user receives a NDR.
However, if we restart the Transport Service, the messages for gmail still in queue will then send.
This will continue for a time and then the they will start delaying again and failing, until we restart the service again.
This is only an issue with gmail accounts...Unfortunately as more of our customers are using gmail this is growing into a larger issue. Has anyone had experience with this type of Exchange behavior? Solutions?
BTW, our Exchange server is our SMTP server and is the only Exchange Server on the network. Running Exchange 2007 on Windows 2003 Standard x64.