Delivery Status Notification - Failure

Contact the recipient. The notification will usually tell you why: either, over limit or just plain blocked because the account was closed.

Sorry about that, but your only hope is to use the phone. Try the magazine's numbers.

Sometimes you get onto what's called a Realtime Blackhole List.
This happens if a spammer picks up your e-mail address, and uses it to spoof your address as spam to someone else. Net result, you get blacklisted, and certain internet providers end up randomly blocking your e-mails. I've seen this happens most frequently when I send to Comcast e-mail addresses.

You can try a couple alternatives:

1. Sending with a webmail program (changes the header of your e-mail address), and if your e-mail provider doesn't have one, you can use http://www.mail2web.com/

2. Create a gmail account and send from there. At least that way, you'll have a very different address.