Receiving emails sent by Dynamics for Marketing seems to be not 100% verified. Next to the sender appears the additon "via eur.pb-dynmktge.com" in the email client. Looks unprofessional and makes clear, that the mail wasn´t sent personally by the sender.

Our company is using Cloud EU and Dynamics 365 including Dynamics for Marketing. SPF entries are added in the DNS records as well as DKIM.
Is there something missing?