Email verification plugin for WordPress and WooCommerce
Stop fake, mistyped and disposable email addresses at sign-up, checkout, in comments and in contact forms, before they reach your customer list. Nothing changes in your forms: visitors with a wrong address simply see a clear message.
Where it checks addresses
WordPress registration
wp-login.php sign-up
Comments
visitors only, not logged-in users
WooCommerce checkout
classic and block checkout
WooCommerce accounts
"My account" registration
Contact Form 7
every email field
WPForms
including confirmation fields
Gravity Forms
every email field
Elementor Pro forms
every email field
Never loses a sale
If a check cannot be done in time, or your credits run out, the address goes through.
Fast
A quick check during checkout, and cached results for addresses already seen.
Your rules
Choose what to refuse, where to check, the message shown, and addresses to always allow.
Set up in three steps
- 1
Install
In WordPress, open Plugins > Add New > Upload Plugin, choose the zip and activate it.
- 2
Get a key
Create a free MailQuell account, then Developer Hub > API Keys > create a key with write permission.
- 3
Paste it
Settings > MailQuell: paste the key, choose what to refuse and where, and save. Use "Test an address" to check.
Free to start
200 checks every month + 100 welcome credits. One credit per new address.
Questions
What happens if MailQuell is slow or down?
The address is accepted. The plugin waits at most the time you set (4 seconds by default) and never blocks a form because of a problem on our side, including an empty credit balance.
How many credits does it use?
One credit per new address. Results are cached for 30 days by default, so a customer who orders again does not cost a second credit. Addresses and domains on your allowlist are never checked.
Which addresses are refused?
By default: addresses that do not exist, disposable (temporary) inboxes and disabled mailboxes. You can also refuse role addresses such as info@, catch-all domains and other risky addresses.
Does it work with the WooCommerce block checkout?
Yes. It checks the billing email on both the classic checkout and the block checkout, and on "My account" registration. It is compatible with High-Performance Order Storage.
What data is sent to MailQuell?
Only the email address typed in the form, with your API key. No names, orders or other form fields. No email is sent to the address.
Not on WordPress? Check addresses from any site with the free tools or the REST API in your dashboard.