Addon to supress auction-won-spam in mail

Hey guys,

for some reason, on this server, i get 3 ingame mails for every item i buy on the auction house.
This has happened before for me on some other private servers, and not on some others. however, since it happens to me here, i'd like to ask if anybody knows any addon or trick to get rid of that kind of system-spam?

thanks in advance! :)

I use Postal, I only get 1 letter when I win an auction and Postal allows me to just click "Open All" and it loots the item and deletes the mail.

Now, if I sell an item on AH I get 2 letters - one saying my item was sold, the other later with the money.
In postal I click Open All and it will auto-open all Money Mail and Delete them, but the confirm sale that we get right away hangs out and I just have to spam click the X for each one in the list of mail - not bad but still not automated.