An IMAP account already exists. Only a single IMAP account is allowed to be saved.
I recently had to restart my MacBook Pro in safe mode after I had password problems and I am now getting this error message when I try to update the hotmail account because it has stopped sending emails from Mail. Every time I try to save the changes I received the following message:
A IMAP account already exists. Only a single IMAP account is allowed to be saved.
I removed the account from Mail and then added it again but it has not changed the situation. I have read advice to restart in safe mode but it is this that caused the problem. Doing this also cleared my keychain passwords which is an absolute pain I do not want to go through again.
Does anyone have any suggestions as to how to fix this issue please?
MacBook Pro 13″, macOS 11.7