Compilation

go get github.com/foxcpp/mailsec-check

Usage

mailsec-check example.org

Example

$ mailsec-check protonmail.com-- Source forgery protection[+] DKIM:    _domainkey subdomain present; DNSSEC-signed; [+] SPF:     present; strict; DNSSEC-signed; [+] DMARC:   present; strict; DNSSEC-signed; -- TLS enforcement[+] MTA-STS: enforced; all MXs match policy; [+] DANE:    present for all MXs; DNSSEC-signed; no validity check done; -- DNS consistency[+] FCrDNS:     all MXs have forward-confirmed rDNS[+] DNSSEC:     A/AAAA and MX records are signed;$ mailsec-check disroot.org-- Source forgery protection[+] DKIM:   _domainkey subdomain present; DNSSEC-signed; [+] SPF:    present; strict; DNSSEC-signed; [ ] DMARC:  present; no-op; DNSSEC-signed; -- TLS enforcement[ ] MTA-STS: not enforced; all MXs match policy; [+] DANE:    present for all MXs; DNSSEC-signed; no validity check done; -- DNS consistency[ ] FCrDNS:     no MXs with forward-confirmed rDNS[+] DNSSEC:     A/AAAA and MX records are signed;