While both IMAP and POP3 are protocols for accessing email, IMAP is the preferred choice for most users, especially those who check email on more than one device. POP3 is an older protocol and has limitations that can lead to confusion or lost messages when used in modern setups.
|
IMAP |
POP3 |
| Email Storage |
Emails are stored on the server |
Emails are downloaded and usually removed from the server |
| Multi-Device Access |
Fully supported; all devices stay in sync |
Not supported; each device is isolated |
| Sent Items |
Sent emails are saved on the server |
Sent emails are saved locally on the sending device only |
| Email Folders |
Server-side folders (Inbox, Sent, Drafts, etc.) are synced |
No folder syncing; only Inbox is typically downloaded |
| Offline Access |
Requires caching or manual sync for offline use |
All downloaded emails are available offline |
| Server Space Usage |
Uses more server storage |
Uses less server storage (emails are removed after download) |
| Setup Complexity |
Slightly more complex, but modern clients handle it easily |
Simpler to configure manually |
| Best For |
Users with multiple devices or who need consistent access |
Users with a single device and limited storage needs |
Additional Pros and Cons
|
IMAP |
POP3 |
| Pros |
- Synchronization across devices (ideal for smartphones, tablets and multiple computers)
- Centralized backup — emails remain on the server even if a device is lost or fails
- Folders and read/unread status are consistent across all devices
- Better suited for collaboration or shared mailboxes
|
- Emails are downloaded and stored locally — useful for long-term offline access
- Frees up server storage by removing emails after download
- Simpler to configure in very basic or legacy setups
|
Cons |
- Emails use server storage — if you have a quota, it can fill up unless you archive or delete old emails
- Requires an Internet connection for full functionality (though most clients offer offline caching)
|
- No sync between devices — email actions (read, delete, reply) are not reflected elsewhere
- High risk of email loss if the device fails or the mailbox isn’t backed up
- Sent mail and folder organization are handled locally and are not portable
|
