Post Office Protocol (POP3)

The POP3 protocol is used to collect e-mail from a mailbox stored somewhere on a server. Unless you are running a secondary mail server that just uses SMTP and processes a mail queue you will need a POP3 server to allow your users to collect their mail.

As with the SMTP Service there are no restrictions on the number of users and mailboxes you can have with our POP3 service.

There are also a number of built-in anti-spam and Denial of service (DoS) countermeasures. You can specify domains, networks and computers to block. If you also use our IPDB Service you can also block connections based on the country they are coming from for additional protection. This protection is hierarchical in nature, meaning that you can couple rules together to, for example, block all connection from a country but allow connections from a particular ISP but block connections from ADSL users on that network.

We have also included anti-DoS countermeasures in the POP3 Service (and the SMTP Service) that instantly rejects connections from an address that attempts to connect too many times in a short space of time. This is a common way of trying to overload servers and stop them from being able to service genuine clients.