I use sendgrid for transactional emails, but its automations are expensive.
So I use mailchimp for marketing.
At the moment sendgrid uses a return path with my domain, and a cname record to be able to get my bounces.
Thus all sendgrif email are 100% DKIM and SPF compliant.
Mailchimp uses their own return path, thus failing SPF (see here: Mailchimp failing SPF)
Is there a company that uses the same CNAME record method as Sendgrid, and is more marketing oriented like Mailchimp)? at the moment Sendgrid seems to be the only one with full DKIM and SPF compliance.