Will DMARC cause my legitimate email to be rejected?
The first step in leveraging DMARC involves using “observation” mode – in other words, simply viewing the data available through DMARC. By doing this, you will be able to see exactly what email would be rejected if you implemented a DMARC reject policy.
While our goal is to get all senders to Reject policies, this is the final step in the process. There is zero risk of legitimate mail being rejected as a result of observation mode.