Because I've now got ADSL installed (super-fast internet connection stuff) I'm no longer using AOL as my main Internet Service Provider.
If your address book contains my address as email@example.com that's fine, because that's what I now use. Previously, all post sent to this email was forwarded to firstname.lastname@example.org and people got replies back from email@example.com.
[However, just to confuse things, I shall still use the AOL account when 'on the road' with laptop WWW access or when emailing from internet cafes. I will still read my AOL mail but you'll find you reach me quicker by using firstname.lastname@example.org ].