How to use POP3 for email

Post Office Protocol version 3 (POP3) downloads email from your mail server to your local device. Unlike IMAP, which keeps messages on the server, POP3 removes them after download by default. This frees up server storage and lets you access downloaded messages offline.

You will learn how POP3 works, when to use it instead of IMAP and whether it suits your email workflow.

How POP3 works

When your email client connects to the mail server using POP3, it performs three actions in sequence. Understanding this process helps you decide whether POP3 fits your needs.

1. Authenticates your credentials.
   The mail server verifies your username and password before allowing access to your mailbox.
2. Downloads new messages.
   All unread email transfers from the server to your device and stores locally in your email client.
3. Deletes messages from the server.
   By default, POP3 removes downloaded messages from the server. Some email clients let you keep a copy on the server, but this is not standard behaviour.

Because messages store on your device, you can read them without an internet connection. This makes POP3 useful in low-bandwidth environments or when you need offline access.

POP3 compared to IMAP

The main difference between POP3 and IMAP is where your email lives. POP3 downloads messages to your device and typically removes them from the server. IMAP keeps all messages on the server and syncs them across multiple devices.

Use POP3 if you check email from one device and want to manage storage locally. Choose IMAP if you access email from multiple devices or need server-based folder organisation.

When to use POP3

POP3 suits specific workflows where local storage and single-device access matter more than cross-device syncing. Consider POP3 if you meet these conditions:

• You access email from one desktop or laptop only
• You need to free up server storage space regularly
• Offline access to downloaded messages is a priority
• You prefer managing email storage on your own device

POP3 is not suitable if you need to access the same mailbox from multiple devices or rely on server-based folder structures. In those cases, IMAP provides better flexibility.

Wrapping up

You now understand how POP3 downloads email to your device, removes it from the server and provides offline access. You know when to choose POP3 over IMAP based on your device usage and storage needs.

Review your email workflow to decide which protocol suits you. If you need help configuring POP3 in your email client, our email guides cover setup for popular applications.