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This plugin prevents people from registering with disposable email addresses (dea) like the ones provided by mailinator (also known as throw-away email, one-time email). It protects your most important asset, your registered user base, by preventing contamination by fake accounts. This plugin working principle is similar to spam blacklists.
It hooks in the wordpress function is_email() so it will extend the known email validation of wordpress to detect dea domains.
The plugin itself does not contain a list of domains to block. Instead of local maintenance the plugin uses the service of http://www.block-disposable-email.com. This is a very accurate free service for up to 200 queries a month. For huge sites several commercial plans are available.
Please see the FAQ section for some more information.

Block Disposable Email

This plugin detects one-time email addresses (disposable email, trashmail, mailinator, 10minutemail) and helps to keep your userbase and comments clea …

Sajjad Hossain Sagor

Block Spammy Disposable/Temporary Emails To Increase Your Conversion & Filter Out Spam Emails.
<h4>Features:</h4>
<ul>
<li>No Complicated Settings, Just Plug & Play</li>
<li>Enable Filtering for Specific Forms</li>
<li>Fully Translation Ready</li>
<li>Customize Messages for Disposable/Temporary Email Alerts</li>
</ul>
Use this plugin to block/prevent disposable emails like 10MinuteMail and GuerrillaMail from submission on any contact form 7 form. Filter our your email listing to keep only real subscribers or users.
Credits 
– https://github.com/andreis/disposable

Disposable Email Blocker – Contact Form 7

Now You Can Easily Block/Prevent Disposable/Temporary Spam Emails From Submitting on CF7 Form.

Block Disposable Email vs Disposable Email Blocker – Contact Form 7