Leaving Messages On The Server
When you retrieve e-mail messages from a POP3 server (POP3 is a common protocol that is used to retrieve e-mail messages from an Internet e-mail server.) e-mail account, the messages are deleted from the e-mail server by default after they are downloaded to your computer. For many people, this works great.
However, if you want to check your e-mail from multiple computers, or be able to see new messages in webmail while your mail client is running, you must configure your mail client to not delete the messages from our e-mail servers. This scenario is most common for people who want to check their home e-mail account from work and download the messages for permanent storage on their home computer.
When you leave messages on our e-mail servers, you can choose from several options to delete your messages. To make your choice, you need to consider several factors about your e-mail usage, such as how long you want the messages to be accessible from multiple computers and the storage limits imposed by your e-mail server administrator. If you exceed your storage limit, you might be unable to receive new messages or might be charged additional fees.
Please remember that this is a function of your mail client and not our servers. We cannot control how your mail client interacts with our servers, and technical support may not be able to help you with the more advanced functions of your particular mail client.
Obviously, we cannot support all mail client settings, but we have listed for reference the inctructions for Microsoft Outlook. As this is the most popular email client, there is a good chance that these instructions will apply to you.

If you do not select either check box, messages are left on the server indefinitely. You will eventually exceed your mailbox quota, unless you connect to the e-mail server from another computer that has Outlook configured to remove messages from the e-mail server.