I have a hotmail account and an icloud account. Icloud works fine. Hotmail receives ok but when I reply to a message or try to send a new message eMC has started picking the icloud account to send from by default and when I try to use hotmail I get the following error message and will not send.
[SMTP] Cannot send message (Sending email “test” failed with error: ‘From’ field address not accepted due to the following reason:
"5.7.0 From address is not one of your addresses