How to Fix the 550 5.1.1 error
Posted onThe most common type of “550 5.5.1” error messages are: 550 5.1.1 : The email account that you tried to reach does not exist 550 5.1.1 : Recipient rejected 550 5.1.1 : User unknown 550 5.1.1 : Recipient address rejected: User unknown in virtual alias table Major causes of “550 5.5.1” error messages are: Wrong […]