Test your domain name’s setup

If you’ve got a couple domains that you run, you should check out http://www.dnsreport.com/ and use its tools to make sure everything is set up as it should be. It’ll tell you if your configuration is valid, the address is set to receive email, and also point out potential trouble spots. I used it and found that I’d forgotten to setup email addresses for abuse@ and postmaster@ on some of my domains.