Since cartomancers can get mail daemons as pets from randomly dropped summon cards, but the mail daemon is a useless pet because it has no attacks, there should be a new monster either as a grown-up form or replacing mail daemons entirely, called a “postmaster”, which is a useful and capable pet.

If you are illiterate and receive some mail, the mail daemon will offer to read it to you.

When a mail daemon delivers a scroll of mail and you have kept illiterate conduct so far, it offers to read the message to you rather than just giving you the scroll which you can’t read.