The phone is ringing, and I don't recognize the number, All Caller ID says is, "NAME UNAVAILABLE".
Please help me figure out who is calling and what they want
I am not so sure I believe it is really for the US Postal Service. I am inclined to believe it is someone trying to sell stamps or something and attempting an end run around DNC complaints by vetting if you collect stamps first with the "poll" and by you having to call back with a pass code generated after the poll. When I called it back I couldn't get anywhere without a code.