Jure

Plugin will automatically check all the inputs with “email” type and suggest a correction to the visitor in case of a typo. 
Example: “john.doe@gmal.com” instead of “john.doe@gmail.com”.
This is especially useful when sending transactional emails back to the customer after placing an order, submitting a contact form, etc.
Sending emails to the non-existent addresses will result in so called “bounces” which will decrease reputation of your sending IP address. 
Your server’s IP address might get blacklisted and your customers will no longer receive emails from you.
Plugin is using “Mailcheck.js” library: 
https://github.com/mailcheck/mailcheck/

Email Address Validator

By using this plugin, website looks and feels more professional by suggesting correct email address in case of a typo.

Website feels more professional

This plugin is great. Now I have fewer invalid emails on my orders!

Amazing plugin

Check email address inputs for common typos and fix them with only one click. Easily define custom checks.

TiomKing

ReWord WordPress plugin allows the users to suggest fixes for content mistakes on a wordpress site. It enhances users experience, and lets the readers take part in editing and proofreading content, while providing a reliable online content checking, using the power of the masses.
Intuitive frontend User Interface to report mistakes and send them to Administrator. Just mark mistake text, click on “R” icon, add your fix and send it.
The reports admin page displays all reported mistakes, and lets admin fix them, or ignore them. Admin can also set the number of alerts before showing a report, to ensure accurate reports and real issues detection in site content.

ReWord

ReWord - Make It Right! Allow your readers to help and report mistakes in your site.

Email Address Validator vs ReWord