Open-source, self-hosted email deliverability testing platform

Next generation SMTP mailer plugin for WordPress. Trusted by over 300,000 sites by WPExperts.io

📧 Never end in spam with the world's most comprehensive email deliverability checklist

Email Deliverability Management Library - Email Authentication, Reputation Monitoring, Email List Hygiene, IP Warming Tools & Unified Interface to manage all.

Test your Email Deliverability by schedule and receive email reports.

Example of checking email delivery using mailsac in Java

AI-powered email management and marketing skill for Claude Code. Inbox triage, composition, quality review, deliverability audit, automation sequences, and marketing strategy.

Comprehensive email marketing campaign strategies covering modern email automation, personalization, and optimization methodologies. Build relationship-driven email programs that convert.

mailchimp python deliverability audit

Automated email deliverability audit and self-cleaning system. Safely classifies bounced, spam, and invalid emails into clear buckets, preserves real users, improves sender reputation, and supports cron-based cleanup without risky deletions.

Free tool to audit your cold email infrastructure. Get a deliverability health score with actionable fixes in 2 minutes.

Analyses DMARC reports in detail

Automated tool to extract failed recipient email addresses from bounce-back messages. Helps maintain mailing list hygiene and improve email deliverability.

MXLab - Email Deliverability & DNS Analysis Tool. Self-hosted mail-tester.com alternative with SPF, DKIM, DMARC verification, SMTP testing, and comprehensive DNS lookups.

📫 Asynchronous email deliverability verifier that performs MX lookups, SMTP RCPT probes, and catch-all detection with retries, resume support, and CSV/JSON reporting.

A simple email validation utility written in GO

📧 Validate large email lists efficiently with an async tool that checks deliverability while respecting rate limits and providing detailed provider feedback.