I'm guessing at what you want to do here.
Are you wanting to have your email messages downloaded to your computer, so you don't have to log in on the internet to read them?
If this is the case, is the mail your isp mail or something like hotmail, yahoo, gmail, etc?
In order to have messages downloaded to your hard drive, you'll need to set up an email client, such as Outlook Express, Outlook, Windows Mail, Thunderbird, etc.
An email client can be configured to work with your ISP mail.
As for .pdf files, you'll need to get a program which will open them.
Adobe can be used, it can be downloaded from here: http://get.adobe.com/reader/
If you mean something else when you say WANT MY MAILS TO BE READ BY THE COMPUTER please let us know.