DKIM fejl fordi quotes indsættes i Content-Type charset

[Mortal]

Når følgende mail kommer gennem mailsystemet er der indsat quotes rundt om utf-8, og så fejler DKIM verifikation. Input:

Content-Type: multipart/alternative; boundary="JLHV59WCPRHGVBNKIJYKGSO9NATHV6"
Content-Transfer-Encoding: 8bit

--JLHV59WCPRHGVBNKIJYKGSO9NATHV6
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain; charset=utf-8

redacted
--JLHV59WCPRHGVBNKIJYKGSO9NATHV6
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html; charset=utf-8

redacted
--JLHV59WCPRHGVBNKIJYKGSO9NATHV6--

Output:

Content-Type: multipart/alternative; boundary="JLHV59WCPRHGVBNKIJYKGSO9NATHV6"
Content-Transfer-Encoding: 8bit

--JLHV59WCPRHGVBNKIJYKGSO9NATHV6
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain; charset="utf-8"

redacted
--JLHV59WCPRHGVBNKIJYKGSO9NATHV6
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html; charset="utf-8"

redacted
--JLHV59WCPRHGVBNKIJYKGSO9NATHV6--