Any anti-spam mailbox mods out there?

One of my space girls is spammed with 4 gold seller messages a day, every day.
I know there are addons which can block chat messages according to filters such as level etc.

I'm not sure why they have decided to spam her with messages but none of the others.
I've never bought gold and always report gold spam, when sitting around a city between doing things.

I'd be happy with an addon which blocked/deleted any mail not from:
a) guild
b) friend's list
c) auction house
d) blizzard

Anyway, anyone have an idea on blocking in-game spam mail?

SpamMeNot should handle the tells. As for the in-game mail, there's really not much you can do about that ;(