If you want to check whether an email address is valid, you can use an email checker tool. Here are some steps on how to do it: First open the Email Checker by TrickyScoop on your browser.

Here are four regular expressions (often called regexes) that all validate the format of an email address. They have increasing degrees of complexity. The more complicated, ...

The Internet Engineering Task Force (IETF) document, RFC 3696, “Application Techniques for Checking and Transformation of Names” by John Klensin, gives several valid e-mail addresses that are rejected ...

The U.S. Patent and Trademark Office (USPTO) has released Trademark Examination Guide 1-20, which goes into effect on February 15. The Exam Guide implements the Office’s final rule, published ...

Provide a U.S. mailing address (includes military addresses, APO/FPO/DPO, AE, AP, or AA). Once you have a valid email address, you are ready to create your personal my Social Security account.

Twitter account setup requires a valid email address so there's a way to contact you when you have new account activity -- new followers, a mention or a new direct message, for example. If you're ...

I tried to sign-on to HealthCare.gov using my govexec.com and hotmail.com email addresses today and was told that both were not valid, blocking me just three screens into the process. Folks, I ...