Port 143 — IMAP

Internet Message Access Protocol. Manages emails on a server. Keeps emails synced across devices.

Is Port 143 Open on Your Server?

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Port 143 Details

Port143
ServiceIMAP
ProtocolTCP
EncryptedNo
Common UseInternet Message Access Protocol

How to Check Port 143

Online: Use our Port Scanner — enter your IP and port 143.

Command line:

nc -zv your-server-ip 143 (Mac/Linux)

Test-NetConnection -ComputerName your-server-ip -Port 143 (PowerShell)

Check locally:

ss -tlnp | grep :143 (Linux)   netstat -an | findstr :143 (Windows)

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