This is to verify that I actually own that email address before my account is activated.At this point, why keep parsing email addresses for their format? They can get ridiculously convoluted as in the case above and, according to the specification, are often too strict anyway. If you actually check the Google query I linked above, people have been writing (or trying to write) RFC-compliant regular expressions to parse email addresses for years.But what if I told you there were a way to determine whether or not an email is valid without resorting to regular expressions at all? The activation email is a practice that’s been in use for years, but it’s often paired with complex validations that the email is formatted correctly.It’s surprisingly easy, and you’re probably already doing it anyway. If you’re going to send an activation email to users, why bother using a gigantic regular expression?To verify the validity of an email address simply enter the email address into the box provided and our "validate email address" tool does the rest.
If (like me when I first saw this) you AREN’T experienced at Regex, it takes a while to parse. The local string (the part of the email address that comes before the @) can contain any of these characters: is a valid email address. For this reason, for a time I began running any email address against the following regular expression instead: Simple, right? This is often the most I do and, when paired with a confirmation field for the email address on your registration form, can alleviate most problems with user error.
Mistyping an email address in that form, of course, and then have your browser remember that incorrect address for all the signup forms to come.
If you want to validate email addresses entered into your form but avoid complicated tinkering and scripts, HTML5 lets you rely on the browser — without effort, and without turning to Java Script.
Browsers that do not recognize type="email" should (and, as far as one can tell, all will) treat the input field like an ordinary type="text" field.
Note that HTML email address validation will only work in browsers that support HTML5 and validate form element input.
NET component that enables developers to read and write email files (MSG, EML, MHTML), and compose, receive and send email messages using IMAP, POP, and SMTP from .