I review outreach and email-marketing tools, and deliverability is the one metric most senders ignore until their open rates quietly collapse. MailGenius kept coming up as the free spam checker that doubles as a full deliverability platform, so I dug into what it actually tests, how the pricing works, and whether the paid plans from $23/mo earn their keep. Here's my honest, no-hype review.
MailGenius is an email deliverability platform and free spam checker built to answer one question every sender worries about: will your email land in the inbox or the spam folder? You send a test email to a generated address, and it returns a spam score plus a breakdown of what's hurting you. The brand says users test over 1 million emails per year, and it positions itself as more than a basic spam filter check — a full suite of deliverability tools for serious senders.
The headline is that the core spam test is free — you can check an email's deliverability without paying anything. Paid plans add volume and AI tools, with 20% off annual billing. The Beginner plan is $23/mo for 60 email tests a month, the AI Email Deliverability Consultant, AI copywriting analysis and rewrite, and the official cold-email guide. The Genius plan is $39/mo (the popular pick) for unlimited email tests plus the ability to test competitors' or prospective clients' emails. The Automatic Email Testing & Domain Monitoring plan is $79/mo (best value), where unlimited tests run automatically on every email you send. There's also email deliverability consulting from Troy and his team if you want hands-on help.
The free spam test is the real hook: you can diagnose an inbox-vs-spam problem in minutes without a credit card, which is genuinely rare in this category. The platform works with every major ESP and CRM, so it fits whatever stack you already run, and the combination of SPF/DKIM/DMARC checks, blacklist scanning, and inbox placement previews covers the technical fundamentals that actually move deliverability. The AI deliverability consultant and copywriting rewrite are a smart touch — they don't just flag problems, they tell you how to fix them — and the $79 automatic-monitoring tier is sensible for teams who send constantly and can't babysit every campaign.
Honesty matters: MailGenius is a deliverability testing and diagnostics tool, not a sending platform — it tells you why emails land in spam, but you still send through your own ESP, so it's a complement to your stack, not a replacement. The $23 Beginner tier caps you at 60 tests a month, which heavier senders will blow through fast, so if you test constantly you'll want the unlimited Genius or automatic-monitoring plans. And like any deliverability tool, it surfaces the issues — fixing DNS records, warming domains, and rewriting copy still takes work on your end (or the paid consulting).
If you send cold email, run agency campaigns, or do serious B2B outreach and your open rates don't add up, MailGenius is a capable, fairly priced way to find out exactly why — and the free spam test means you can prove its value before paying a cent. Start with the free tester to see your current score, then move to a paid plan if you need unlimited tests, AI rewrites, or automatic monitoring. From $23/mo it reads as fair value for anyone whose revenue depends on landing in the inbox.
Want to try it? You can run a free MailGenius spam test directly here — a free email deliverability and spam checker with SPF/DKIM/DMARC checks, blacklist scanning, inbox placement previews, and AI deliverability tools, with paid plans from $23/mo.
Disclosure: this review contains an affiliate link. A free test is available; paid pricing is billed at the listed rates with a discount on annual plans. Check the current pricing page for the latest plans and any promotions.
