Knowledgebase: POP3 Server (Incoming)
How much mail can I have stored on each POP3 account?
Posted by Roy Petersen on Feb-15-2007 12:16 PM

You can store up to the full amount of storage available on your hosting account with us. However, there may be limitations set by you specific to each POP3 account you have set up. For example, you may create an account for a friend and limit their disk usage to 1 Megabyte. This includes any attachments that may be included with the e-mail message.
It is always a good idea to check your e-mail regularly to make sure you haven't reached your limits. If your e-mail exceeds the limits of your account or settings, any additional incoming e-mail will bounce and not be delivered.

Woollybear.com strongly encourages you to not store e-mail only on the server, but keep copies on your local system in case of failure.