When you send someone an email attaching document files like Microsoft Word, Excel etc or a Pdf file, unless your recipient has the particular application installed, he/she may not be able to view the file.
While there are several alternatives that your recipients can adopt to view the file, here is a simple solution that you can follow that will save your recipients the hassle.
When you send an email with such attachments, just mark a copy to firstname.lastname@example.org, i.e. add email@example.com as a cc: recipient. Your recipients will then get a second email message that contains links they can click to view your attachments as iPaper, which is a sort of online PDF alternative and all anyone needs to view them is a browser.
You don’t have to be registered with Scribd.com to use the above feature but If you have an account, the converted documents will be stored in your account and you can view them later. The only hitch is that the iPaper documents are not editable and are not always exact representations of the original. But the pros definitely outweigh the cons.