What is the flow of an outbound email?

What is the flow of an outbound email?

First of all, the email is checked by the DMARC Policy if present. In case the DMARC policy is set to p=none; nothing will be done to the email received, but if the policy is set to p=quarantine and p=reject, then the email is sent to the spam and is rejected from the mail server itself respectively if the mail failed to pass DMARC authentication.