Exchange 2010 sp3. Random users return a a non delivery statment "Delivery has failed to these recipients or groups"
HI - This entire work day i have been having random users email return the below non delivery statement. I have rebooted the server several times it seemed it helped a little but, there are still users that are having this issue occur. I have done message tracking in EMC but nothing shows pertaining to that message. It is also verified that these are the correct email addresses being sent to. I am not to exchange savvy just a one man band that has inherited exch2010 for the past two years. Please advise if possible
"Delivery has failed to these recipients or groups: A problem occurred during the delivery of this message. Please try to resend the message later."
Also, check the server application logs for any errors.