Mail problem
I have a 2019 iMac running OS Mojave. Yesterday the Mail program started to permanently say "Saving Draft 969 bytes" even when there are no Drafts or any other activity. Apple Support told me to log into my email server and delete all drafts that might be there. I did that and the problem continues. They then said I need to update to Catalina because I'm running an old OS. I also did "rebuild" on the drafts mailbox and that did nothing. Although now there is no Drafts mailbox listed under Mailboxes!
Does anyone know why this is happening? I plan to update to Catalina as soon as I replace some incompatible applications. In the meantime I wanted to get to the bottom of this.
Thank you!
iMac 21.5", macOS 10.14