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Port 143 (tcp/udp) :: SpeedGuide
All About IMAP Ports 143 And 25 - Monsterhost
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What Are Email Protocols - POP3, SMTP and IMAP - SiteGround
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Internet-Security.com TCP port 143 details
Port 143 (TCP/UDP) - IMAP - Internet Message Access Protocol ...
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GRC | Port Authority, for Internet Port 143 - Steve Gibson