Email authentication protocol preventing domain spoofing and phishing attacks.
A typo-based SPF include exposed how look-alike domains can bypass security.
Spoofing targets depend on domain exposure, authentication gaps, and automation—not company size or staff count.
Yahoo appears to reject forwarded emails due to authentication and header modification issues.
June 1 marks strict enforcement of Google and Yahoo email authentication requirements for senders.
Even small, lightly-used domains can be exploited for spoofing, phishing, and scams without owner knowledge.
Ensure email HTML templates avoid homoglyphs to prevent spam filters blocking legitimate marketing emails.
Threat actors abused AppSheet to send phishing emails that passed DKIM and DMARC checks.
