I posted this a week or so back, or tried to. I am getting the error message below every time I send an email. I wish to fix this but really don't know what or how to do it. The reported error was "Failed to append to mbox:///home/myuser/.local/share/evolution/mail/local#Sent: Invalid folder URI 'mbox:///home/myuser/.local/share/evolution/mail/local#Sent' Appending to local 'Sent' folder instead.". Any tips appreciated john