Sumada Kaabaha: email filter
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MailboxValidator Email Validator
Email verification for WordPress forms. Block disposable, block spam, block invalid email, block free email and role-based email.
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GEV Email Validator
The Cheapest advanced Email Address Validation to forms. Prevents typos in email address field and eliminates spam submissions with fake email address …
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String Replacer
Replace any string visible to site visitors or found in outgoing emails—titles, content, footers, and more. Comes with a dynamic admin interface.