Not really a suggestion I guess just an idea that can already be used.

-Make a thread in off topic,
-name it "<yourName>mail" with no spaces,
-make the tags your name and "mail"
-drag the url onto your desktop to make a link,
-rename the link ace of spades mail

please consider using this if you dont want to give away your email adress while playing.

Also you could make a folder under the ace of spades folder and call it friends and then add the links to your friends AOSmail threads inside that folder.