Editing Post Office Protocol (section)

===Kerberized Post Office Protocol===
In [[computing]], local [[e-mail client]]s can use the '''Kerberized Post Office Protocol''' ('''KPOP'''), an [[application layer|application-layer]] [[Internet standard]] [[protocol (computing)|protocol]], to retrieve [[e-mail]] from a remote [[mail server|server]] over a [[Internet protocol suite|TCP/IP]] connection. The KPOP protocol is based on the POP3 protocol – differing in that it adds [[Kerberos (protocol)|Kerberos]] security and that it runs by default over [[Transmission Control Protocol|TCP]] port number 1109 instead of 110. One mail server software implementation is found in the [[Cyrus IMAP server]].