MS Exchange server corrupting PGP-MIME emails

David Smith Dave.Smith at
Tue Oct 4 11:11:35 CEST 2011

Possibly a bit off-topic, but...

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?

If I'm going to complain to our local IT about it, I need some hard
evidence about how it's breaking the PGP-MIME RFC.

I've attached an example of a mail before and after it's been through
exchange - I've put it in a .tgz to stop any modification by mailservers
en route.

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