2222 Mails

I found 2222 private emails in my mailbox this morning. None newer than yesterday. All mails I got from people I know or whom I asked about something and now hardly know.
And most people haven't written for years now. Or I haven't written for years. Sometimes some people got mad about something and that's why I never heard of them.
How many emails would there be, if I delete all emails from people I haven't spoken or written with in the last year? - 20.