[ietf-dkim] Postfix: change of Content-Transfer-Encoding breaks DKIM signature / RFC recommendation

[SM]

Hi Florian,
At 12:03 25-03-2009, Florian Sager wrote:
>According to the mails below the RFC compliant change of content
>encoding in MTA-forwarding may break signatures that follow the RFC 4871
>recommendation to include header "Content-Transfer-Encoding" in the
>signature. This header should be removed from section 5.5. Recommended
>Signature Content (The following header fields SHOULD be included in the
>signature ...).

Won't the change in content-transfer-encoding (not the header field) 
performed by an MTA affect the body part and by extension break the 
DKIM signature?

Regards,
-sm