Email Validation vs Guerrilla Mail

AbstractAPI's email verification endpoint checks format, deliverability, and quality signals such as disposable, free, and role-based addresses, returning an autocorrect suggestion and quality score per lookup. A free monthly quota is available before metered paid plans apply.

Guerrilla Mail issues disposable, auto-expiring inboxes and lets a client poll or fetch their incoming messages through a simple JSON-over-AJAX endpoint, no signup or key required. It's a fully free anti-spam utility with no paid tier.