The problem with web based email accounts, such as Hotmail and Yahoo, is that they are prone to spamming, especially if you have used/given your email address to websites/companies, and not kept them solely for family and friends.

If you don't want any spam, then you should open a new account and only give your email address to family and friends, and also ensure that they do not forward to you emails which have a whole list of "cc" names attached.

I have two web based accounts which I only use for websites/companies and they get spam galore, whereas two other accounts get nothing, because I have kept those addresses private and only given to those I trust.