I am Assuming that u have outlook 2003 email client installed in ur computer. Hotmail does not have forwarding feature ( As far as I know)
For Gmail and Yahoo, u will get forwarding feature. It works well for Yahoo bcoz u are not getting any ads. But one thing u remember that If u use Yahoo for Outlook, then the emails u r recieving is not stored in their server. That is a negative point.
On the other hand for Gmail, the emails u recieved in Gmail Inbox is stored in their server by default which is a very useful thing. :roll:
But one thing u remember my friend that do not mix up Internet life with ur personal life. Use at least 2 Email ID's. One for putting on website and other for giving ur ID to Ur friends and relatives. The later u can use safely with MS Outlook. No fear of Spam. This is bcoz I have atleast 8 Email addreses and I recieve spam on only one mail - the one which I putted on the website.
If u mark any unsolicited msgs as spam be sure to select the mail and Hit the Spam Button. (Do Not Delete them. It will automatically moved to trash folder) All of ur 3 Emails have bulk Folder in their server. Yahoo and Hotmail does not count bulk emails towards their Inbox Storage Quota. About The Bulk Folder Of Gmail I do not know, bcoz I did not recieved a single piece of Spam.
If u r not getting any spam, u will not get any Virus. U can use Avast Antivirus (
www.avast.com) to get a free copy of antivirus which actively detects all ur incoming emails b4 they spread on ur computer.
CHEERS