This source is known to forward email
HubSpot is capable of sending DMARC compliant email because they support custom DKIM and SPF configurations that achieve alignment. This source is most commonly known to send Marketing Automation and Transactional emails and is often used by Marketing, Product, and Software Development teams.
The link just below is a resource on how to configure DKIM. You will complete this configuration by (1) following the sources instructions and (2) adding the required entries into your DNS. https://knowledge.hubspot.com/domains-and-urls/connect-your-email-sending-domain
In order for SPF to align, you must purchase and configure a dedicated IP. Data suggests that very few dmarcian customers choose this route and instead configure DKIM alone. This approach allows for messages to pass DMARC without issue. If you do not purchase a dedicated IP and configure SPF authentication via this source, you should not have the source listed in your domain's SPF record. More information on SPF setup with HubSpot can be found here: https://knowledge.hubspot.com/email/connect-a-dedicated-ip-address-for-sending-emails