POP SMTP
IMAP Email Client
Mailbox Port
Mail Server

 

A standard protocol for sending emails across the Internet. The Post Office Protocol used by email clients to download messages from a mail server to a local device.
Software or application used to access and manage email accounts. A protocol that allows users to access and manage their email on a remote server.
A numerical identifier used to distinguish different communication channels on a networked device. A repository for storing incoming emails until retrieved by a user.
A server responsible for receiving, storing, and sending emails.