Here is an easy one

[shazam]

I am going to change eml address. I want to notify everyone in my address book. I know there is a way to notify everyone all at once. But I have forgotten how. I also need to know how to inform PC Mech. Thanks in advance.

[sdkfz]

Select everyone in you e mail program address book but add them all as BCC -Blind Carbon Copy - not CC - so everyone gets just the one e mail address (themselves) and not everyone else's. Useful in case some one has a virus/gets a virus and they have saved all of your address's in their book and then the virus start mailing, also useful for privacy concerns.

You still need a primary address so just send it to your self.