POP3 is the latest version of a very popular e-mail retrieving protocol, functioning over TCP/IP. In the early days of the Internet most users connected through dial-up and needed an e-mail protocol that could download the e-mails locally for later offline review. POP3 was perfect for such use
With the advent of broadband "always-on" Internet connections and the more modern IMAP e-mail retrieving protocol, POP3 saw its popularity diminish. E-mail client features such as "Leave Messages on Server" were intended to remedy some of its shortcomings, however these implementations are faulty and tend to cause problems.
The POP3 RFC can be found here
PolarisMail fully supports the POP3 protocol on port 110 for unencrypted communication and port 995 for the SSL version.
In order to not receive an SSL certificate warning when using the SSL version, you must use our servername , pop.emailarray.com ,in your e-mail client configuration