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② 後台搜尋「Bulk Email Checker – Email Verification & Validation」→ 直接安裝（推薦）
原文外掛簡介
Bulk Email Checker protects your WordPress site by verifying every email address in real-time before it enters your database. Stop fake signups, reduce bounces, and keep your mailing lists clean – automatically.
Bulk Email Checker integrates with 32 WordPress form and registration plugins out of the box.
What works without an API key: email syntax validation, your allowlist and blocklist, and cached results all run on your own server as soon as the plugin is activated. Every integration, the Quick Verify tool, and form submissions use these checks immediately.
What the API key adds: real-time mailbox-level verification and bulk scans of existing users. That work is performed by the Bulk Email Checker service on external servers and cannot be done locally.
Why Bulk Email Checker?
32 form integrations – works with WooCommerce, Contact Form 7, WPForms, Gravity Forms, and more
Real-time verification – emails are checked before form submission completes
Bulk user verification – scan and verify all existing emails in your WordPress users table
Smart result caching – saves API credits by remembering recent results
Detailed analytics – track verification trends, pass rates, and blocked threats
Full MX enrichment – see mail server info, ISP, and geolocation for every check
Typo correction – automatically suggests the correct email when users make typos
Whitelist and blacklist – always allow or always block specific emails and domains
WooCommerce ready – protects checkout, registration, and account pages
Multisite support – network-wide settings with per-site overrides
Privacy controls – optional hashed email storage for GDPR compliance
Supported Form Plugins (32 Integrations)
Contact Forms:
Contact Form 7, WPForms, Gravity Forms, Ninja Forms, Formidable Forms, Fluent Forms, Forminator, WS Form, Elementor Pro Forms, Jetpack Forms, Everest Forms, Caldera Forms, HappyForms
WooCommerce:
Checkout, Registration, My Account
User Registration:
WordPress Registration, WordPress Comments, Ultimate Member, BuddyPress, Profile Builder, WP-Members, Theme My Login, User Registration, MemberPress
Newsletter:
MailPoet, MC4WP (Mailchimp for WordPress), Newsletter
LMS and E-Commerce:
Easy Digital Downloads, LearnDash, LifterLMS, GiveWP
Catch-all Override:
Built-in is_email() filter that covers any form not listed above (optional, disabled by default)
How It Works
A visitor submits a form on your site
Bulk Email Checker intercepts the email address
The email is verified against the BEC real-time API
Valid emails pass through normally
Invalid, disposable, or suspicious emails are blocked with a customizable error message
Results are cached so repeated submissions use zero additional credits
Bulk User Verification
Already have users in your database? The Bulk Verify tool lets you scan and verify every email address stored in your WordPress users table:
Filter users by role before scanning (e.g. only verify Subscribers or Customers)
Set a credit cap to control maximum spend per scan
Get a cost estimate before starting so you know exactly how many credits the scan will use
Start immediately or schedule the scan for a specific date and time
Emails are processed in background batches of 25 so the scan does not slow down your site
Real-time progress tracking with pass, fail, and unknown counts
Verification results are saved as user meta and displayed as a new column in the WordPress Users list
Filter your Users list by verification status to quickly find failed addresses
Close the page and check back later – scans continue running in the background
Typo Correction
When a visitor submits a misspelled email address (e.g. [email protected] instead of [email protected]), the Bulk Email Checker API detects the error and returns a corrected suggestion. The plugin displays a friendly “Did you mean [email protected]?” prompt on the frontend, allowing the visitor to fix their email before the form is rejected. This reduces friction and helps legitimate users complete their submissions without confusion.
The suggestion message is fully customizable in Settings > Messages.
Configurable Rejection Rules
Choose exactly which email types to block:
Invalid and non-existent mailboxes (always blocked)
Disposable email addresses (blocked by default)
Role-based accounts (info@, admin@, support@)
Free email services (Gmail, Yahoo, Outlook)
Catch-all and accept-all domains
Gibberish or randomly generated addresses
Known complainers
Offensive usernames
Admin Dashboard
The plugin includes a full analytics dashboard with interactive charts:
Verification trends – daily volume over 30, 60, or 90 days
Pass rate tracking – monitor your email quality over time
Status breakdown – see the split between passed, failed, and unknown results
Rejection reasons – understand why emails are being blocked
Recent activity – the latest verifications with status, event, and source details
Activity Log
Every verification is logged with the complete API response:
Filter by status, source, email, or date range
Expandable detail rows show all email flags (disposable, role account, free service, etc.)
Full MX enrichment data: mail server hostname, IP, ISP, ASN, city, country, timezone
Export filtered results as CSV
Automatic log purging to manage database size
Analytics
Dedicated analytics page with configurable date ranges (7, 30, 90 days, or custom):
Verification Volume – daily counts stacked by status
Pass Rate Trend – line chart showing pass percentage over time
Status Breakdown – donut chart of pass, fail, and unknown distribution
Rejection Reasons – breakdown of why emails were blocked
Quick Verify Tool
Test any email address directly from your WordPress admin. See the full verification result including all flags, MX enrichment data, and execution time – useful for spot-checking addresses or debugging.
Import and Export
Export all plugin settings as a JSON file
Import settings to restore configuration or replicate across sites
Export and import whitelist/blacklist entries via CSV
Smart Caching
Results are cached locally with configurable TTL (time-to-live) per status:
Passed emails: default 24 hours
Failed emails: default 24 hours
Unknown/catch-all: default 1 hour
Cache lookup uses SHA-256 hashes for fast retrieval
Flush all or flush only expired entries from the Tools page
API Failure Handling
Choose what happens when the API is unreachable:
Allow (default) – let the email through
Block – reject the email
Use cache – serve stale cached results if available, otherwise allow
Multisite Support
Network-level activation with shared API key
Per-site setting overrides
Network admin settings page
Each site gets its own verification cache and logs
External Service: Bulk Email Checker API
This plugin relies on the Bulk Email Checker third-party API service to verify email addresses. When a visitor submits a form on your site and email verification is enabled, the plugin sends the submitted email address to the Bulk Email Checker real-time verification endpoint at https://api.bulkemailchecker.com/real-time/ along with your API key.
What data is sent:
The email address being verified
Your API key for authentication
When data is sent:
When a visitor submits a form protected by one of the 32 supported integrations
When an administrator uses the Quick Verify or Bulk Verify tools in the WordPress admin
When the credit balance is refreshed on plugin admin pages
What data is received:
Verification result (valid, invalid, disposable, role account, etc.)
Mail server (MX) enrichment data (hostname, ISP, country)
Remaining credit balance
Typo suggestion if the domain appears misspelled
No data is sent to the API when a cached result exists for the email address. The plugin stores verification results locally in your WordPress database to minimize API calls.
An API key from bulkemailchecker.com is required for the real-time mailbox verification performed by the external service. You can create an account and purchase verification credits from the BEC panel.
Bulk Email Checker Terms of Service
Bulk Email Checker Privacy Policy
Third-Party Libraries
This plugin bundles the following third-party libraries. Both are included unmodified and their original license and copyright notices are preserved in the bundled files.
ApexCharts v3.54.1 – Modern charting library used for the analytics dashboard. Copyright (c) ApexCharts. Released under the MIT License. Bundled at assets/vendor/apexcharts.min.js. Source code: https://github.com/apexcharts/apexcharts.js
Action Scheduler v4.0.0 – Background job queue used for bulk verification scans. Copyright (c) Automattic, Inc. Released under the GPLv3 License. Bundled at lib/action-scheduler/. Source code: https://github.com/woocommerce/action-scheduler
