US Patent 11991139 Automated email protocol analyzer in a privacy-safe environment

A computing server may receive an authorization from a domain owner to gain access to email data of the domain owner. The email data may be hosted by a mailbox service provider on behalf of the domain owner. The computing server may determine email protocol check results of the email data retrieved from the mailbox service provider. The computing server may determine that a sender has a number of failed emails in the email data that fail the email protocol check. The computing server may identify, from the email data, one or more recipients of the domain owner to whom the failed emails intend to be sent. The computing server may notify the domain owner regarding information about the one or more recipients.