Validating an email address in javascript

In this page we have discussed how to validate an email using Java Script : An email is a string (a subset of ASCII characters) separated into two parts by @ symbol. ~ characters are legal in the local part of an e-mail address but in the above regular expression those characters are filtered out. It begins with at least one or more word characters including the underscore, equivalent to [A-Za-z0-9_].

Once you’ve inserted our script onto your site, the real-time verification will be active on your website. Within minutes of updating your source code your email list will be more accurate than ever, giving your email marketing campaign the best chance of success.

It seems that the checking validation of email addresses is actually two separate problems: 1- Validation of email format: Making sure if the email complies with the format and pattern of emails in RFC 5322 and if the TLD actually exists. For example, although the address function valid Mail(mail) // VALID MAILS valid Mail('[email protected]') // Return true valid Mail('[email protected]') // Return true valid Mail('[email protected]') // Return true valid Mail('[email protected]') // Return true valid Mail('[email protected]') // Return true valid Mail('user mailbox/[email protected]') // Return true valid Mail('"very.(),:;[]:,;@\\"! ^_`| ~.a"@example.org') // Return true valid Mail('"[email protected]"@example.com') // Return true valid Mail('"Fred Bloggs"@example.com') // Return true valid Mail('"Joe.\Blow"@example.com') // Return true valid Mail('Loïc.

Accentué@voilà.fr') // Return true valid Mail('" "@example.org') // Return true valid Mail('[email protected][IPv01: DB8::1]') // Return true // INVALID MAILS valid Mail('Abc.example.com') // Return false valid Mail('[email protected]@[email protected]') // Return false valid Mail('a"b(c)d,e:f;gi[j\k][email protected]') // Return false valid Mail('just"not"[email protected]') // Return false valid Mail('this is"not\[email protected]') // Return false valid Mail('this\ still\"not\[email protected]') // Return false valid Mail('[email protected]') // Return false valid Mail('[email protected]') // Return false Thank you for your interest in this question.

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