EA Mobile’s The Sims FreePlay has a glitch? Typical… Anyways, update the app/game and the bug will be fixed.

The Sims FreePlay - 1.0.3 update

What’s New In Version 1.0.3

Having trouble completing the “Check Your Mail” goal? UPDATE NOW and the next time that you collect your Daily Reward from the mailbox, you will complete the goal.

Source: Sims.Mixei.Ru