Every WordPress site bleeds fake signups: disposable inboxes, typo domains, bot farms, and test@test.com. You pay for ESP seats, skew analytics, and pollute CRM data — all because registration accepts any string with an @.
The Email Validator WordPress plugin verifies addresses at signup using the same REST API as Single Check and bulk.
What Gets Blocked vs Allowed
Default plugin policy:
| Status | Registration |
|---|---|
| valid | ✅ Allow |
| risky | ✅ Allow (with caution) |
| unknown | ✅ Allow (inconclusive) |
| over_quota | ✅ Allow (mailbox exists) |
| invalid | ❌ Block |
| disposable | ❌ Block |
| catch_all | Configurable |
You control thresholds in plugin settings — block catch-all on high-value SaaS, allow on community forums.
Credits: What Costs What
Same billing as the main platform:
| Status | Credits |
|---|---|
| valid | 1 |
| invalid | 1 |
| over_quota | 1 |
| catch_all, risky, unknown, disposable | Free |
Blocking a disposable address costs nothing — high ROI for SaaS trials.
Setup in 5 Minutes
- Install plugin from WordPress addon page
- Enter your API key from dashboard
- Choose forms to protect (WP registration, WooCommerce checkout, Contact Form 7)
- Set block/allow rules per status
- Test with a disposable address (
@mailinator.com) — should reject
Real-Time vs Async
Real-time (default): user submits form → API verify → accept/reject before account created.
Async (optional): accept signup, flag suspicious emails for admin review — useful when UX latency matters.
Typo Protection
Before SMTP, we check common typos:
gmial.com→ suggestgmail.comyahooo.com→ suggestyahoo.com
Fixes addresses that would otherwise verify as invalid after the user left.
Same Engine as Everything Else
Plugin calls /api/v1/verify — identical to:
- Single Check dashboard
- Bulk processing
- Company Finder Verify
No "lite" verification tier. Status you configure in WordPress matches API documentation.
WooCommerce & Membership Sites
Especially valuable for:
- Free trial abuse (disposable emails)
- Digital product delivery (invalid = lost customer)
- Membership plugins (paid tier signup quality)
Pair with double opt-in for marketing lists — verification handles existence, not consent.
Monitoring Plugin Health
Check dashboard for:
- Verification count spikes (bot attack?)
- High disposable block rate (consider CAPTCHA)
- API rate limits (upgrade plan if needed)
Install the plugin — WordPress addon docs →
Related: API Integration Guide · Disposable Email Guide