I was just checking out the new features from Yahoo! Mail and they have implemented a new button which filters the e-mails you have so you see only e-mails from the address book. I discovered an e-mail I have received from a good family friend on the 28th of December 2008 !!! I have never seen that e-mail which was pretty important and I had even thought that I had been ignored by that person, making eronate judgements about him!
God, how could I e-mail him telling “Well, you see, I just received your e-mail dated almost 7 months ago.”?? Geeeeeeez!!!

Should I be a good friend and state that Yahoo! Mail sucks donkey balls?
Switch to Gmail and you don’t have any problems of this kind; you can even set it up to send email as if it were sent from your Yahoo! account(s).
Also, better spam filters… waaaay better spam filters; plus using custom filters that actually work.
Seriously, get rid of Yahoo!
I second that… Gmail > Yahoo! when it comes to mail (and many other things)
Switch to Gmail