Mail is a web-based email system.
Your email messages, address book and other account information are stored on our servers, rather than on your computer. Mail email messages does not make your computer vulnerable to computer viruses. In addition, attachments sent along with email are not a threat to your system if you do not download them. However, if you choose to download an attachment by either opening it or saving it to your computer, your computer does then become vulnerable to computer viruses. For this reason, we recommend that you do not download attachments or other files from any source that you do not know and trust.