Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
If you cannot open the Attachments when they are saved separately from the email, as PDF files, to your hard disk, with anything... then you're simply running up against something being wrong with the sender's PDF file quality.
If it is otherwise, if those PDF attachments, when saved to your hard disk separately from the email, open fine with everything... then you have a different sort of problem, and in that case, let me know. And I will advice you further.
It seemed to me that you were talking about accessing PDF files after saving emails with attachments (also PDF files) using a Sperry plug-in for your email program to do the saving of those emails.
Is that the subject, or was it just one example?