You probably don't want to change your address but there is less chance of someone randomly generating your address if you put some numbers into it.
You don't have to be a genius to come up with
[email protected] (or whatever) if you are desperate enough to think that sending out a million emails will be a good way to part people from their money.
Some email companies are better than others in filtering out these unsolicited scam messaqes- I never get any on my gmail account, for example, but get them everywhere else, including at work where our security is pretty tight.