Question: Can't Delete Signatures In Mail
I have a 2013 MacBook Pro running the latest version of High Sierra. Since upgrading to High Sierra I've had the problem with an excessively long Mail preferences window. In trying to delete my signatures to correct the problem - I used both the "-" button and selected them all and hit the "delete" key - I find the signatures just regenerate after I close and reopen the window or restart Mail. Any suggestions on how I can permanently delete those signatures?
MacBook Pro with Retina display, macOS High Sierra (10.13.3)