Do You Erase Old Email Addresses

I have finally gotten used to the weekly, "Did you get my email?" phone calls from my mother. Predictably, every Sunday around late afternoon, she calls to tell me about something cute my nieces have done, or fill me in on the latest gossip about someone I went to high school with. "I wrote this in an email, didn't you read it?" she'd say. Of course, I had never received the email, and just assumed my less-than-tech-savvy mother was doing something wrong. This time though, I asked a question that I don't normally ask: "What email address are you sending it to?" She rattled off an address I hadn't even thought about for at least a year. Oops.

I logged into the old account and, lo and behold, amid a ton of spam in my inbox were a bunch of emails from Mom.

Most of you leave old social networking profiles online even if you don't use them, but what about old email addresses? Do you close old accounts when you open a new one?