Domain/email name validation
s
sujaydeymountblue
An email should be valid in all aspect like
should check valid domain, well-formed and valid mailbox
John Canning
Along with valid syntax, it would be nice to force user input to all lowercase before validation. Email addresses are case-insensitive so any uppercase characters can be forced to lowercase and then validated. That makes it easier for users accustomed to using mixed case or copying from a source that has mixed case to enter the email address.