Let me start by saying that we have a process on a Unix server that creates PDF documents, and then uses mailx with uuencode to attach the files and send them to employees mailboxes (Exchange 2010). If they use Outlook to view the PDF files, there's no problem viewing them. But if they use their iPad, which is setup to view emails from the Exchange server, to view the same email with PDF attached, then the screen just goes blank.
Now if they use the iPad to forward the email to themselves, then they are able to view the PDF attachments.
Any ideas why the iPad cannot view the PDF attachment?