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Post Office Protocol v3
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Application Layer — Email
Protocol Overview
Full Name
Post Office Protocol v3
Abbreviation
POP3
OSI Layer
Application Layer
Category
Email
Default Port
110, 995
RFC
RFC 1939
About POP3
Protocol for downloading email from a server to a local client. Typically deletes messages from the server after download.
Application Layer
Email
Port 110, 995
Standards Reference
POP3 is defined in RFC 1939, published by the Internet Engineering Task Force (IETF). RFCs are the official standards documents for internet protocols and are freely available for public review.