All encrypted email messages are received as two attachments named message.pgp and version.txt.
This is called PGP/MIME. This is a newer format that is being used as the preferred method of encryption. PGP Partitioned messages are the ones that start -----BEGIN PGP MESSAGE-----, etc.
This pertains to PGP Desktop 9.x running on Windows 2000, XP, 2003 and Mac OS X.
Starting with PGP Desktop 9.0, all messages that are encrypted to a public key that has a preferred keyserver set in it's key properties will be sent as PGP/MIME encrypted messages. If this isn't desired then the holder of that key will need to remove the preferred keyserver from their key and then redistribute their key to those who need to encrypt messages to them.
Note: When you send your key to a keyserver using automatic methods such as right clicking on your key and sending to keyserver.pgp.com, this will add that keyserver as the preferred keyserver on the key properties. If you want to publish your key on the PGP Global Directory, but you don't want to have this listed as a preferred keyserver, you can manually send your key to the keyserver by opening a browser to keyserver.pgp.com and using the upload section of that page.
In version 9.5 and above of PGP Desktop, there is a new section of key properties called Encoding. This can be Partitioned or PGP/MIME. If you didn't want to have the message.pgp and version.txt anymore, you'll need to set this to Partitioned and republish this to whatever keyservers have your key on them.
Imported Document ID: TECH148951
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