VBulletin has no official way of checking PM's, as they are private, but I've written a script that scans them for various web sites, spam, etc, and flag them up. Then under the T&C I can then unencrypt the ones where a legal violation in Win2Win Limited's policies may have been breached, but only then.
They have been used on our forums as part of legal action in the past, with a 100% succes rate.
But PM's are basically private, and only you can see yours, unless rules are broken.
