How to convert your mutt email from mbox format to Mailbox format

A very brief manual.

1. Download a „simple but Perfect” mbox to Maildir converter.
2. Convert all your mboxes to Maildirs with this tool.
3. Change your $HOME/.procmailrc.
   1. Change the MAILDIR variable if needed.
   2. Add slashes at the end of paths where to move mail. For example, gentoo-user → gentoo-user/. You need to do this to make procmail to put your mail into new/ subdir.
4. Change your $HOME/.muttrc.
   1. Change folder and spoolfile variables if needed.
   2. Change mbox_type from mbox to Maildir.