Create Interface to MimeTreeParser for Headers
Open, Needs TriagePublic

Description

To verify the DKIM status on our own (as it is not checked by your mailserver). It needs CPU power to check the DKIM status.
We end up implementing an Interface for accessing the mailheaders not directly from the KMime, instead using a interface to access all mailheaders.

Also MemoryHole would benefit also from that.