Email Validation Filter for Contact Form 7

Email Verification Filter for Contact Form 7 provides additional functionality to Contact Form 7’s mail verification feature.
To use it, you need to install Contact Form 7.
The following three filters are provided, and this plugin will work after Contact Form 7 has been validated.

Reject filter

Specify the email address or domain of the user you want to reject, and restrict submissions from the form.
The target users can be the email addresses or domains specified in the administration screen.

RFC Filter

Restrict form submissions from email addresses that do not conform to RFC specifications and requirements.
A period [.] is the first character, an at mark [.] is the second character, and so on. is used at the beginning, before an at mark [@], or consecutively.

• [email protected] ([. @]) The domain is correct, but a period [.] is entered before the at mark [@]. is typed before the at mark [@])
• [email protected]([…] typed in. The domain is correct, but a period [.] is entered in succession. is entered consecutively)

DNS Filter

Checks if the domain of the email address entered is registered with the DNS server and if it is a valid email address for submission.
The problematic email address will be restricted from submitting the form. The following email addresses that pass Contact Form 7 validation are restricted.

• [email protected] (Enter [comcom]. A domain that does not exist)
• [email protected] (Enter [.com.com]. Non-existent domain.)