Is This Irony?

I spoke with an old friend for the second time in less than a week. At times, we go months without speaking. He called to tell me he received the email I sent him last night. What was that about? I've sent him plenty of emails over the past year and never once has he called to tell me he received them. Regardless (or irregardless... you make the choice), I was glad to see his name pop up on my caller id. Our conversation lasted less than two minutes but it made my day. Thanks!