uni a has swapped over to office 365, since i very, very much dislike OWA i have my email set up in thunderbird. imap access to the account works fine but the smtp setting i have wont. ive tried everything i can think of but i keep getting the error.
An error occurred while sending mail. The mail server responded: 5.7.1 Client does not have permissions to send as this sender. Please check the message and try again.
why?
is it due my using the emall address in its real form i.e. number@uni.ac.uk rather than number@live.uni.ac.uk?