Reliable WordPress email delivery with multiple providers, two connections, Return Path, Reply-To and visual AND/OR routing.
Alternatives to Mailster Kickbox
Plugins below are selected for functional relevance and current directory signals. Active-install counts do not affect this ranking.
Relevant replacements
WordPress plugins with similar use cases
Compatibility and update metadata provide context, not a quality guarantee. Review each plugin’s details for your site.
Dilli Email Validatorv1.7.1.0
Validates email addresses in real-time and blocks form submissions with invalid or fake emails. Reduce spam, fix typos, and capture quality leads.
FixBounce Email Verifierv1.0.0
Block fake, disposable, and non-existent emails via SMTP verification. 5 free verifications/day, no signup needed.
SMTPing Email Verifierv1.6.0
Email verification for WordPress forms and every email your site sends. Block invalid, disposable and spamtrap addresses.
Block invalid emails like temporary, disposable, etc. with our real-time email verification. Verify email address during form-fill and stop form spam.
DeBounce Email Validatorv5.8.9
Real-time email validation for WordPress forms. Block invalid, disposable, and risky emails to keep your database clean and improve deliverability.
Real-time email verification for WordPress. Block invalid, disposable, and risky email addresses on registration, comments, checkout, and forms.
🚀 Transform Your Email Quality with Real-Time Validation Tired of fake emails, spam signups, and invalid customers? Unelma Email Verification with S …
ZBounce Email Validatorv1.2.6
Check form email addresses with the ZBounce service. Requires purchased verification credits and an API key from zbounce.net.
Truelist Email Validatorv1.0.0
Validate email addresses in real-time on WordPress forms using the Truelist API. Block invalid, disposable, and role-based emails.