Author Uses 3 DNS Records to Keep Business Emails Out of Spam
Updated
Updated · ZDNet · May 27
Author Uses 3 DNS Records to Keep Business Emails Out of Spam
7 articles · Updated · ZDNet · May 27
Three DNS records—SPF, DKIM and DMARC—were implemented to authenticate a business domain, improving inbox placement and reducing the risk of spoofed emails being sent in its name.
SPF authorizes approved sending servers, DKIM adds a cryptographic signature to detect tampering, and DMARC tells receiving servers how to handle failures while sending back reports.
DMARC setup starts with a monitoring policy such as p=none and 2-4 weeks of report review before tightening to quarantine or reject, avoiding the common mistake of blocking legitimate mail.
Gmail and Yahoo began enforcing these checks for bulk senders in February 2024, and Microsoft extended similar requirements to Outlook.com, Hotmail and Live.com in May 2025.
Validity's 2025 benchmark report said properly authenticated domains can see inbox placement rates about 60 percentage points higher than unauthenticated ones.
If DMARC fails against compromised accounts, what is the next essential layer of defense for corporate email systems?
With most breached firms having weak DMARC policies, is mandatory enforcement the only way to ensure real email security?
As AI perfects phishing emails, can sender authentication alone protect us from the next wave of AI-driven deception?