About Mail Security Tools
Free email authentication and deliverability checks for SPF, DKIM, and DMARC. Clear scores and fixes for domains that get spoofed or land in spam.
Mail Security Tools offers free SPF, DKIM, and DMARC checks so you can see if a domain can be spoofed or is misconfigured. Reports explain what is wrong and how to fix it in plain language. Useful for sysadmins, MSPs, and business owners who need deliverability and spoofing defenses without another enterprise suite.
