0x800CCC79 - 501 Syntax Error

Error Message:

  •  
  • Error 0x800CCC79 msg could not be sent - recipient was rejected by server... 501 char not allowed

    Cause:

  • Email address is entered incorrectly

    Fix:

  • Open the message from the Outbox and correct the email address. Make sure there are no spaces or incompatible characters