Add a TXT record to your DNS to instruct receiving servers on what to do if an email fails authentication. Host: _dmarc
DKIM adds a cryptographic signature to your emails, verifying that the email was actually sent from your domain and hasn't been tampered with. gmailcom yahoocom hotmailcom aolcom txt 2019 fix
As of 2024–2025, Google and Yahoo have implemented much stricter rules. If you are working with an email list in a .txt file, you need to "fix" the formatting and authentication to prevent your messages from being flagged as spam. 🛠️ The "2019–2025 Fix": Essential Email Checklist Add a TXT record to your DNS to