This source is known to forward email
Forcepoint is capable of sending DMARC compliant email because they support custom SPF and DKIM configurations that achieve DMARC alignment. Forcepoint is a Security Platform and is often used by Network, Security and Email Administrator teams. Read more here: https://www.forcepoint.com/blog/insights/managing-dmarc-requirements-forcepoint-email-security
The link just below is a resource on how to configure this source to send DKIM-aligned email on your behalf. You will complete this configuration by (1) following the source's instructions and (2) adding the required entries into your DNS. https://www.websense.com/content/support/library/email/v82/esg_help/enable_dkim_verification_explain_esg.aspx
We recommend opening a support ticket to get help with custom SPF configurations as we couldn’t find any relevant ‘how to’ documentation on their site. You must log in to your account to submit a ticket: https://support.forcepoint.com/s/contactsupport