Actually, if I send you an email, I probably won’t see what you mean because I don’t think the problem is at your end – or even a problem that you specifically can control.
Yes, a hacker may walk away with just an address book. The more frightening question is… what else could the hacker access?
How do I stop [email being sent as me] or prevent a hacker from getting into my address book?
This was a follow-up question from someone who’d discovered that, as they put it, “Somebody is using my email address book to send spam to my friends.” I had pointed them at Someone’s sending email that looks like it’s from me to my contacts, what can I do?
What’s critical to realize here is that it’s extremely likely that they don’t just have access to your address book; they have access to your entire email account.
And that’s exactly where prevention begins.