mailcheck
Checks a domain's MX, SPF and DMARC email setup
About mailcheck
mailcheck is a free email deliverability checker for domain owners who want to know whether their mail can be trusted. It looks at MX records, SPF and DMARC, the settings that decide whether messages reach inboxes and whether anyone can spoof your domain.
The site is aimed at founders and small teams who send email but rarely look at their DNS configuration. Misconfigured records usually fail without any visible error, so problems often surface only when mail lands in spam or gets forged. You enter a domain and get a check with no signup required.
A paid report, priced at 0.02 USDC on Base, adds a DKIM selector probe and ready-to-paste SPF and DMARC fix snippets. mailcheck is made by Doormat Capital.
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