Pondus
6
everyone should have two mail accounts…
one that you use for comunicating, and one you use on the internet when registering, news letters…etc etc
this way you may avoid/reduce the amount of spam recived
yahoo also have a trick for this, you can sett up mail alias, and when you start reciving spam on it, you just delete the alias address
Yahoo mail alias. http://help.yahoo.com/kb/index?locale=en_US&y=PROD_ACCT&page=content&id=SLN3240
however, i would use a real address for registering avast
since you like Yahoo, why not get a extra Yahoo account…it is free