August 25, 2023 (1y ago)

POP is a commonly used acronym in technology that stands for Point of Presence or Post Office Protocol.

It refers to the standard protocol used for retrieving emails from the server to the client email software.

Let's understand in detail what POP means and its purpose.

What Does POP Stand For?

POP has two common full forms:

Point of Presence - Physical access point that allows users to connect to a network service.Post Office Protocol - Standard email retrieval protocol that downloads messages from server to local mailbox.Overview of Post Office Protocol (POP)POP is an application layer protocol defined in RFCs 1939 (POP3) and 1725 (POP2)POP enables email clients to retrieve mails from the server over TCP/IP connections.Common POP3 port numbers are 110 (non-SSL) and 995 (SSL).It supports core functions like downloading and deleting messages.Key Features of POPDownloads email messages and attachments to local storageRemoves copies from server after downloadingRequires SMTP for sending mailsSupports offline email access once downloadedMore lightweight than IMAPLimitations of POPNo remote access to emails once downloadedNo synchronization across multiple devicesChances of data loss if local emails are corruptedSecurity risks from infected attachment downloads

In summary, POP or Post Office Protocol allows email clients to easily download messages from the server for offline access. However, more advanced protocols like IMAP are better suited for today's access-anywhere email requirements.