Outbound Email Quota

From mail2web.com Wiki

There is a limit of 1000 outgoing emails per account within a 24 hour period. Users reaching this limit will be scaled back to zero over a 24 hour period.

While you will still have access to your email to delete email, if you exceed your storage quota, you will be unable to receive messages unless you purchase additional disk space available through the Control Panel, or free up some space by deleting unwanted emails. You will receive a warning about the size of your mailbox when it reaches 80% of your limit.