Mail7 Email Validation
Real-time email validation for registration, comments and forms via the Mail7 API. Blocks fake addresses - and never blocks one it cannot verify.
Use with caution
Mail7 Email Validation works, but test it on a staging site before relying on it in 2026. Was last updated 1 month ago, and scores 60/100 on our health check.
- Tested with the latest WordPress (7.1)
- Small user base (<10 active installs)
- Very few reviews so far
How does it stack up?
Side-by-side on installs, updates, ratings & support
Daily downloads
Download spikes usually follow a new release — each site that auto-updates counts as a download.
Rankings
Where Mail7 Email Validation stands todayWordPress.org search rankings
Live position in the plugin search, top 100| Keyword | Position |
|---|---|
| contact form 7 | >100 |
| email validation | >100 |
| email verification | >100 |
| registration | >100 |
| spam | >100 |
About Mail7 Email Validation
From the official readme · v1.0.0Description
Mail7 Email Validation checks email addresses in real time as they are entered, using the Mail7 API. It stops fake and undeliverable addresses from getting into your user base, comments and form submissions – which means fewer bounces, less spam and cleaner lists.
Three verdicts, not two. Real mail servers do not always give a straight answer: catch-all domains, greylisting and disposable providers make some addresses genuinely unverifiable. Mail7 returns Valid, Not Valid, or Unknown, and this plugin does not block Unknown addresses by default, so you never turn away a real person over an address that simply could not be confirmed.
What it checks
- Syntax / format
- Domain MX records (can the domain receive mail at all)
- Live SMTP mailbox check
- Disposable / temporary address detection
Where it plugs in
- WordPress user registration
- Comment author emails
- Contact Form 7 email fields
- WPForms email fields
Reliable by default
- Results are cached, so the same address is never re-checked (fast, and no wasted API calls).
- If the Mail7 API is briefly unreachable, the plugin fails open – your forms keep working, no one is ever locked out by an outage.
API key
Works out of the box on Mail7’s free anonymous tier (rate-limited). For higher volume, paste a Mail7 API key in the settings – get one at mail7.net.
External services
This plugin sends each submitted email address to the Mail7 API (https://mail7.net/api/validate-single) to determine whether it is deliverable. Only the email address being validated is sent. See the Mail7 Privacy Policy and Terms of Service.
Installation
- Upload the plugin to
/wp-content/plugins/, or install it from the Plugins screen. - Activate it.
- Go to Settings -> Mail7 Validation to choose where validation runs and, optionally, add your API key.
Frequently asked questions
Do I need a paid account?
No. It works on the free anonymous tier. A Mail7 API key raises the rate limit and volume.
Will it block real users?
Not for unverifiable addresses. By default only addresses Mail7 reports as Not Valid (do not exist / no mail server) are blocked. “Unknown” addresses are allowed. You can optionally block Unknown too, but it is off by default on purpose.
What happens if Mail7 is down?
The plugin fails open: submissions are allowed. Validation never becomes a single point of failure for your forms.
Changelog
1.0.0
- Initial release: registration, comments, Contact Form 7 and WPForms validation with honest Valid / Not Valid / Unknown handling, result caching and fail-open behavior.
Screenshots
For developers
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Best Mail7 Email Validation alternatives
All contact form 7 plugins →
FAQ
Mail7 Email Validation: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Oct 7, 2026
Is Mail7 Email Validation free?
Yes. Mail7 Email Validation is free to download and use from the official WordPress.org plugin directory.
Is Mail7 Email Validation safe to use in 2026?
Mail7 Email Validation works, but test it on a staging site before relying on it in 2026. Was last updated 1 month ago, and scores 60/100 on our health check.
How many websites use Mail7 Email Validation?
Mail7 Email Validation is active on <10 WordPress websites and has been downloaded 134 times since it launched in August 2026. It was downloaded 71 times in the last 30 days.
Does Mail7 Email Validation work with WordPress 7.1?
Yes. The developer has tested Mail7 Email Validation up to WordPress 7.1.3, the latest release. It requires WordPress 5.0 or newer.
What PHP version does Mail7 Email Validation need?
Mail7 Email Validation requires PHP 7.2 or higher. Most hosts run PHP 8.x today, so it works on any modern WordPress hosting.
When was Mail7 Email Validation last updated?
The latest version, 1.0.0, was released on August 30, 2026 (1 month ago).
Who makes Mail7 Email Validation?
Mail7 Email Validation is developed and maintained by denm.
What are the best alternatives to Mail7 Email Validation?
The most popular alternatives to Mail7 Email Validation are Database Addon for Contact… (600K+ installs), Redirection for Contact For… (200K+ installs) and ReCaptcha v2 for Contact Fo… (200K+ installs).
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