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Fri, Jul 28, 2017 5:39 pm

Dovecot not allowing logins to check email

A user reported that she was unable to get her email today and was receiving an error in Outlook when she attempted to download her email. I logged into the email server, which runs Dovecot. I tried establishing a telnet connection to the POP3 port on the server. I was able to successfully connect to the well-known port, TCP port 110, used for POP3 connections. I could then enter the user's username with the user command, but I never received a reponse from the server, i.e. from Dovecot. I eventually had to hit ctrl-], i.e., the Ctrl and "]" keys to return to the shell prompt.

$ telnet 127.0.0.1 110
Trying 127.0.0.1...
Connected to 127.0.0.1.
Escape character is '^]'.
user nell
^]

telnet> quit
Connection closed.
$

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