Below are default email ports that you can use as reference to setup mail client:
| Protocol | Purpose | Encryption | Port |
| SMTP | Outgoing | TLS / SSL | 465 or 587 |
| SMTP | Outgoing | Unencrypted | 25 or 26 |
| IMAP | Incoming | TLS / SSL | 993 |
| IMAP | Incoming | Unencrypted | 143 |
| POP3 | Incoming | TLS / SSL | 995 |
| POP3 | Incoming | Unencrypted | 110 |
Some ISP, by default blocked SMTP port 25 from being abused. You may set your outgoing port to 26 (unencrypted) or 465/587 (encrypted) to send outgoing email.
Difference between POP3 vs IMAP
POP3
- by default email remove from server after content downloaded to your devices.
- you can't retrieve/view the same content after download completed, unless default policy changed on mail client.
IMAP
- by default email remain on server after content sync to your mail client (mobile/desktop)
- you can view the same content on other devices from anywhere, unless default policy changed on mail client.
