DuoCircle supports full DMARC compliance.
For DKIM setup, contact DuoCircle support or visit: https://support.duocircle.com/support/solutions/articles/5000716920-validate-spf-and-dkim-records
Add 'include:outbound.mailhop.org' to your SPF record. More information on DuoCircle's SPF setup is available on: https://support.duocircle.com/support/solutions/articles/5000519471-how-do-i-use-spf-