I was told by a company called ProofPoint that older versions of PDF files have JavaScript embedded in them and will be blocked by some secure email gateways if that company has attachment blocking enabled for JavaScript. I was told that after a certain version that PDF's no longer used JavaScript and that is why the never PDF versions were not getting blocked. I was curious if this is true? And if so, what version of PDF would we have to upgrade to so these attachments don't get blocked?
Thanks,
Drew