validateEmail validateEmail Validate user’s email server Tiki will attempt to validate the user’s email address by examining the syntax of the email address. It must be a string of letters, or digits or _ or . or - follows by a @ follows by a string of letters, or digits or _ or . or -. Tiki will perform a DNS lookup and attempt to open a SMTP session to validate the email server.  Жоқ Иә Yes, with “deep MX” search