Broken DKIM by Mailscanner

[Pimmal]

Hey, i´m stuck.

Mailscanner is breaking my DKIM check, mailscanner disable all good. I dont know why but mailscanne ris always adding a "=" at the End of my text, but only on the plain text part of the email.

here is the part of the email on my outgoing mail:

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

Test3

And thats the part on the received email:

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

Test3=