Since I've upgraded to 10.12.1, my Mail Message Viewer window has had a weird behavior. When I first start Mail it appears fine, everything looks right. However, after a while (and I haven't yet figured out when it exactly happens) I notice that the email address shown on the "To" column will be wrong. It will be someone else I've emailed with, but not the correct person for that message. If I open the email with the wrong "To" address, it appears fine and is the email expected as indicated on the "From" column. If I quit Mail and restart, all is back to normal -- for a while.
Anyone else see this? Any thoughts? Should I wait for 10.12.2, or is there something I can do now to fix this.
Anyone else see this? Any thoughts? Should I wait for 10.12.2, or is there something I can do now to fix this.