Automating handling of Encrypted messages

[Christopher New]

Hi,

I recieve a digital signed email daily which contains a zip file. I would
like to know if there is a way to automate the extraction of this attachment.

I have tried all standard methods but where I run into problems is with the
fact the email is encrypted when recieved. It required someone to manually
open the message, as it won't appear in the preview pane, before the macro
can access it. It always returns nothing and fails with the following
statement ...

Set thisMail = myFolder.Items.GetFirst()

Is there a way to automatically unlock this message in the macro or is there
some other way I should be doing this?

Thanks in advance for any insight you can provide.

Christopher New