You have to type testingcheatsenabled true (With a space). Then, hold Shift + click the mailbox.
There are a few options from which you can choose!
P.S. If any people here have heard of Take it Away, which is my series I'm sorry, but it has ended, I've moved on to Sims 3, because I haven't been able to get my Sims 2 game back! I'm sorry to disappoint you my dears!
I've used the testingcheatsenabled true cheat for a looooong time, and it suddenly decided to stop working for me, too. Did you download any new custom content or install a new expansion pack? I think that was my problem. I had to sort through my packages folder and do some trial and error work to figure out which I had to delete. After that, everything worked fine again.
ok I have tryed using this cheat so many time and it has not worked at all. all I wanna do is make my sims happy so if anyone can tell me how to fix it beside typing testingcheatsenabled ture and right or left clicking y holding shift it would be great