Our data indicates Swift Digital supports full DMARC compliance. https://www.swiftdigital.com.au/blog/dkim-spf-dmarc-email-deliverability/
See this article for DKIM configuration guidance: https://www.swiftdigital.com.au/setup-and-deliverability/
See this article for SPF configuration guidance: https://www.swiftdigital.com.au/setup-and-deliverability/