Attach Plus gives you the ability to set two passwords on the PDF files that you password protect. This allows you to have a master password that you can use to open any password protected PDF email attachment from the Sent folder of your email system.
The two passwords you can set are:
In any of the PDF password dialogs (click here to find out how to show the password dialog), click the 'Use Sender Password' button to expand the password dialog and show the Sender password fields.
Tip: Attach Plus will remember the Sender password you type in, until Attach Plus is closed.