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Using Email Check Plug-in

The E-Mail Check plug-in does not call for any specific configuration, only common settings are available. The plug-in validates a customer e-mail (DNS or SMTP validation), and you can select the type of validation when creating a rule that uses the E-Mail Check plug-in.

DNS validation

Makes you sure that the domain actually exists. The plug-in tries to find an MX or A entry in the Domain Name System (DNS), and if succeeds, this means that there is a mail server awaiting your e-mails by a given e-mail address. DNS check is a huge step towards ensuring the email address is valid.

SMTP validation

The DNS check will probably be enough in most cases - after all, if the domain exists that's more than half the check. Typo's will be caught, and most jokers will give up at that.

However, the DNS validation will still let through some e-mails, regardless of whether it was mis-spelled or entered deliberately.

To guarantee that the email is perfect, there is another method than DNS validation. This method uses the SMTP protocol to contact the domain mail server and actually ask if the user is valid.

Please note that some mail servers don't effectively support this feature, and other domains have a "catch-all" email address so all mail is accepted. SMTP check takes a minute or so.

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