|Scenario Task Parent=I want to be certain of the recipient's identity (and vice versa)
|Scenario Task Type=Impersonation
|Scenario Task Description=Several systems have been developed in recent years to help email providers [https://en.wikipedia.org/wiki/Email_authentication authenticate] the sender of an email message. Most providers currently use an email authentication system to filter spam. If you are a Gmail user, you can understand how this works by reading Gmail's [https://support.google.com/mail/answer/180707?hl=en Email email authentication] guide.
In general, you must rely on your email provider to perform sender authentication, but if you want to be sure and inspect some of the messages you receive manually, you will need to [https://www.arclab.com/en/kb/email/how-to-read-and-analyze-the-email-header-fields-spf-dkim.html learn how to read message headers] (sometimes called "message source"). and authenticate them yourself with these online tools:
* [http://dkimcore.org/tools/dkimrecordcheck.html DKIM authentication ]