
You'll receive a daily report from each participating email provider so you can see how often your emails are authenticated and how often invalid emails are identified. Learn more about DMARC and how to publish your policy. By defining a policy, you can help combat phishing to protect users and your reputation. What you can doĭomain owners can publish a policy telling Gmail and other participating email providers how to handle messages that are sent from your domain but aren’t authenticated. As part of the DMARC initiative, Google allows domain owners to help define how we handle unauthenticated messages that falsely claim to be from your domain. To help fight spam and abuse, Gmail uses email authentication to verify if a message was actually sent from the address it appears to be sent from. If that doesn’t work or you need more help, contact the email provider for your email address. Change this setting so that you’re using the server that matches the email address you want to send from. If you sent the email using a different email application, try looking for a setting in your email application that controls the server used to send messages (the “outgoing” server).
If you sent the email using Gmail, learn how to fix bounced or rejected emails.
If you sent an email to a Gmail user and got an automatic bounce message that says, "Unauthenticated email from is not accepted due to domain's DMARC policy,” see the options below for more information: It can help you prevent your emails from being blocked or sent to spam by Gmail. Gmail Postmaster Tools provides senders with metrics on parameters such as reputation, spam rate, feedback loop, etc. Troubleshoot delivery issues with Postmaster Tools