Mac OS Mail - Cannot send the message using the server Exchange - randomly appeared!
Just for no reason the message "Cannot send the message using the server Exchange" - randomly appeared! It does not affect all mails sent, but a few. I'm in a panic because I am sending a very very important mail and it's held up due to this!
Any answers will be well appreciated - I'm not deeply tech but can cope to a degree.
Many thanks friends!
Jim
Mac mini, macOS 12.7