This plugin detects one-time email addresses (disposable email, trashmail, mailinator, 10minutemail) and helps to keep your userbase and comments clean. Free registration at www.block-disposable-email.com needed.

Dead-Letter.Email for Wordpress. Dead simple disposable email check that just works.

Identify and block disposable fake email addresses to prevent junk user registration and comments.

Adds advanced email address validation to forms using Dilli Email Validation API. Prevents typos in email address field and eliminates spam submissions with fake email addresses.

Adds advanced email address validation to forms using Expert Email Validator API. Prevents typos in email address field and eliminates spam submissions with fake email addresses. Email validation is performed via API on the api.expert-it-service.de.