Is there a way to configure mutt to have the same behaviour as the mail command (from mailutils package), i.e. move messages from user-system-mailbox (e.g. /var/mail/root) to personal-mailbox (e.g. /root/mbox or /root/Mail) after reading ?
The current behaviour (after a fresh mutt installation on Ubuntu 23.10 without any tuning) is that messages stay in the index after reading.