550-5.7.1 Unauthenticated email from "customer domain.com" is not accepted due to
550-5.7.1 domain's DMARC policy. Please contact administrator of "customer domain.com"
550-5.7.1 domain if this was a legitimate mail. Please visit
550-5.7.1 https://support.google.com/mail/answer/2451690 to learn about DMARC
550 5.7.1 initiative.
DMARC is configured in your company's email system and is not part of Workfront. If you receive this email, you need to contact your email administrator.
Your email administrator should configure your email system to allow/trust email from email@example.com or preferably all email from workfront.com.
For more information about DMARC, see https://support.google.com/mail/answer/2451690.