What do web hosts actually mean when they offer unlimited bandwidth? Bandwidth is an indication of how much data can be sent or received in a month. In the case of e-mail accounts, a bandwidth allocation of 25MB simply means that a total of 25 megabytes of e-mail in a month can be sent and received. An e-mail service needs to have a good balance between bandwidth and storage space since the latter tell how much e-mail can be kept in the mailbox.

The terms and conditions of providers should be carefully examined as the real restrictions as to bandwidth may be hidden there. Logically, it is impossible to offer a truly unlimited bandwidth due to simple economics.