Testing email signing and verification

For this example, an email can be sent from a Gmail account to a Fortinet account, and the email's Internet headers can show successful SPF and DKIM signing.

1. Send a test email from your domain to a Gmail address.



2. Once the email has been received, open the email in Gmail and click Show original.



3. Among the various details, you can see that the email passed SPF, DKIM, and DMARC.



Below this summary, you can view the email's full text-readout of properties, including email headers and other diagnostic information. Among this information is the Authentication-Results, showing the specific SPF, DKIM, and DMARC results:

Authentication-Results: mx.google.com;

dkim=pass header.i=@fortinet.com header.s=dkim header.b=Lcxh1a5H;

spf=pass (google.com: domain of example@fortinet.com designates <ip-address> as permitted sender) smtp.mailfrom=example@fortinet.com;

dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=fortinet.com