Beyond SPF and DKIM, (Domain-based Message Authentication, Reporting, and Conformance) is the third critical TXT record. Gmail, Microsoft, and Yahoo all check for DMARC policies for bulk senders. For Gmail and Yahoo, a DMARC record has been required for anyone sending over 5,000 messages a day. Microsoft began enforcing DMARC for bulk senders in May 2025.
# Check SPF nslookup -type=TXT yourdomain.com gmailcom hotmailcom yahoocom txt verified
A is a database of contacts that has undergone a multi-step cleaning process to confirm that each address is valid and currently receiving mail. Microsoft began enforcing DMARC for bulk senders in May 2025
Email lists aren't static; they degrade over time. Industry data suggests that email lists can decay by approximately 22% per year. People change jobs, abandon old accounts, or switch providers. Regular email verification is essential for maintaining a clean and effective marketing database. Industry data suggests that email lists can decay
: Verifies TXT strings directly from Google's servers.
v=spf1 include:_spf.google.com ~all (example for Gmail users) ✅ Why You Need This
Sending to Gmail, Hotmail, or Yahoo without any DMARC TXT record is considered a red flag. Even p=none is better than nothing.