i sent a mail with wrong mail addresses in the CC, and it failed to be sent.
the main problem, is i got the below error more than 100 times, every 5 mins it popup. when i opened the outbox folder it is empty and i keep receiving this message and i can’t make it stop. and i cant find the mail in outbox to delete it
[Exchange Web Services] Sending email failed due to the following error: At least one recipient is not valid., Recipient ‘‘email@example.com’’ is not resolved. All recipients must be resolved before a message can be submitted.