A mail return profile

[sleepergst]

for all of the mail that has been sent to the alt to be returned to the sender

 

[khurune]

You could use postal addon.

 

[Dalees]

postal is pretty cool. I'm using it on my main and also on my bot because if you gotten so muuuuch mails form the AH that it takes about an hour to open all up, you are going insane @_@