The Post Office Protocol 3 (POP3) stores emails in server until computer syncs with server to save storage on server. This typically uses port 110 and 995.
Downsides include:
- Losing emails on faulty computer
- Difficult for email on multiple devices
Commands
| Command | Description |
|---|---|
USER <USERNAME> | Login user |
PASS <PASSWORD> | Login password |
STAT | Number of saved emails |
LIST | List all emails |
RETR <ID> | Get email |
DELE <ID> | Delete email |
CAPA | Display capabilities |
QUIT | Close connection |