MS Exchange server corrupting PGP-MIME emails

Jerry gnupg.user at
Fri Oct 28 16:36:55 CEST 2011

On Fri, 28 Oct 2011 14:07:53 +0100 (BST)
Phil Brooke articulated:

> Hi,
> On Tue, 4 Oct 2011, David Smith wrote:
> > Does anyone have any experience of using an MS Exchange server,
> > where it corrupts PGP-MIME emails by re-encoding the encrypted data
> > in base64? [...]
> (I'm rather late to this thread, but anyway....)
> Nothing relating to encrypted data, but I've seen an MS Exchange
> system rewrite signed emails (both PGP/MIME and S/MIME) with the
> obvious effect of causing failed verifications.

Could you please supply proof of that statement. An example of the
message before and after it was processed by the server would be

Jerry ✌
GNUPG.user at
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