What's spam? I have several E-mail addresses and my financial E-mail is only used for that and no spam is ever delivered. On the other hand, my Yahoo account does get spam, but all of it goes to the spam folder. A few months ago I did get several spoof PayPal E-mails in my inbox that I reported to PayPal and those E-mails stopped like a bad habit.
The point here is that it's all about control. Where you hand out your E-mail makes all the difference in what kind of E-mail you will get. It's always a good idea to have an E-mail address for financial only, one for online signups, etc and one for personal use, etc.