Protocols.

Email protocols shape what happens when you open a mailbox, download a message, or delete something on another device. Their names can seem abstract until a setting changes the location of an important conversation. This collection explains those consequences through everyday tasks, so you can connect a protocol choice with the way you actually use email.

The POP mailbox guide focuses on downloading, server retention, and local copies. The IMAP mailbox guide examines folders and changes shared across connected applications. Both approaches need deliberate configuration, and neither protocol name alone tells you whether you have a complete, recoverable backup of your correspondence.

Use these articles when setting up a second device, moving an old archive, or investigating why folders look different between applications. Pay particular attention to where the authoritative copy lives, what deletion does, and which attachments are available offline. Those questions make the practical differences easier to evaluate.