5.2. Opening an Encrypted PDF File

Your e-mail recipients must have Adobe ® Reader 5 or above to view the encrypted PDF file (along with the password used to encrypt the file)

The viewer is available for download from Adobe ® for free at: Get Adobe Reader

What happens if the recipient does not have Adobe Reader version 5 or above?
If the user has Adobe Reader version 4 or less, the user will receive a warning message stating that the current version of Acrobat cannot open this file.

If the user does not have Adobe Reader at all, they will not be able to open any PDF attachment. Fortunately, most users have Adobe Reader installed - if not, they can download the most current reader for free from: Get Adobe Reader