How I review: I don't pretend to have used every single tool on this list (no one has). But I have used a lot of them on client projects and my own projects, and I'm still learning. If I haven't used a tool, I sign up for a test account to explore the interface, check pricing directly, and research reviews from real users.
Ratings methodology: Ratings are weighted across ease of use, automation depth, deliverability track record, integrations, pricing fairness, and support quality. No vendor can pay to improve their rating.
Affiliate links: Some links earn me a commission if you sign up. This never influences my scores or rankings. Tools are always ranked on merit first.
MXToolbox is the industry-standard free tool for diagnosing email deliverability and DNS issues. Check MX records SPF DKIM DMARC blacklists and email headers. Used by IT admins email marketers and developers globally.
DMARC SPF and DKIM management made simple

Free spam score test for your emails
Inbox placement testing and deliverability monitoring
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