Browsing: spf

DMARC (Domain-based Message Authentication, Reporting and Conformance) is a protocol that uses DKIM (Domain Keys Identified Email) and SPF (Sender Policy Framework) to prevent spam, domain spoofing and phishing via email messages.

Framework) is an email authentication system that uses DNS (Domain Name System) to check if a mail server is authorized to send emails from your domain.

Dermatologists use and suggest these products as the healthiest sunscreens available.