Once you use ImapAutoConnect like @AINTHATEASY suggested, your IMAP will be added to a list inside a file in the UserData directory, so if you want to manually edit your mappings just edit that file.
Once you use ImapAutoConnect like @AINTHATEASY suggested, your IMAP will be added to a list inside a file in the UserData directory, so if you want to manually edit your mappings just edit that file.