How to Email a PDF Document. Portable Document Format files are secure and easy to read using free software, such as the industry-standard Adobe Reader program. Small businesses use PDF files to ...

Use the iPad's built-in iBooks application to attach a PDF document to an email. To do this, your computer must have at least iTunes 10.1 installed and your iPad must have at least iOS 4.2 installed.

“Is there any way to password-protect and lock a sensitive PDF file before sending it as an attachment through email? I cannot afford Adobe Acrobat Pro and free primopdf didn’t work for me ...