The only way to really know if an email address exists is to send an email to the address and then get a response back. Validating email addresses even to determine if a given address is allowed to exist is quite complex. Most scripts that people use to validate email addresses actually reject a large range of potentially valid addresses that fortunately few people use. Here we look at a few different alternatives and their advantages and disadvantages.

JavaScript Email Address Validation

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Tags: email address, javascript, validation