Microsoft Outlook email - Outlook 2003 S/Mime

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February 23rd 06 11:53 AM

Outlook 2003 S/Mime

I am using outlook 2003 with exchange 2003.
I receive s/mime message that are sent to a distribution list.
The problem is though that when i receive the email it has the
smime.p7m attachment and it is not decrypted, I have imported the cert
as that is used to encrypt these messages into outlook, my local
windows xp profile and my AD account.
I have added the sender to my address book and added the cert.. and
still nothing..

Am i going mad or is this releated to the fact that the receipient
email address is not my email address?

Has anybody come across this behaviour before ???

Thanks..

Brian Tillman

February 23rd 06 03:41 PM

Outlook 2003 S/Mime

wrote:

I am using outlook 2003 with exchange 2003.
I receive s/mime message that are sent to a distribution list.
The problem is though that when i receive the email it has the
smime.p7m attachment and it is not decrypted, I have imported the cert
as that is used to encrypt these messages into outlook, my local
windows xp profile and my AD account.
I have added the sender to my address book and added the cert.. and
still nothing..

Something doesn't see correct here. The p7m cert you get is the public key
of the sender; i.e., the digital signature, that will allow you to encrypt
messages to him (her). It's not used to decrypt the messasge. No one
should be able to send you an encrypted message unless you've already given
that person your public key and he used that to encrypt, unless he's
encrypting using some other public key he's received and posting the
encrypted message to the list. In that case, if the person whose key he
used is also on the list, only that one person will be able to decrypt the
message and make sense out of it.
--
Brian Tillman

[email protected]

February 24th 06 02:06 PM

Outlook 2003 S/Mime

On the outside what you are saying seems correct but it is not. I have
used other mail clients (Thunderbird, Evolution) to decrypt the very
same email and they have no problem at all.

So i know the email message is formatted correctly...

Thanks anyway.

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