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Sat, Aug 06, 2016 10:37 pm

Dovecot not accepting passwords

A user reported that email was not working. So I logged into an account on the CentOS 7 email server and connected to port 25, the Simple Mail Transport Protocol (SMTP) port, via Telnet to ensure that the server was responding to SMTP connections.
$ telnet 25
Connected to
Escape character is '^]'.
220 ESMTP Sendmail 8.14.7/8.14.7; Sat, 6 Aug 2016 09:26:06 -0400
221 2.0.0 closing connection
Connection closed by foreign host.

Since the Sendmail SMTP service seemed to be functioning properly, I next checked the Dovecot POP3/POP3S software on the system. I entered the commands an email client would submit to authenticate with the server on the POP3 port, port 110, i.e., pass followed by the user's login id then pass and the password for the user's account. I received an immediate response to the user command, but when I entered the pass command followed by the password and hit Enter I didn't see any response even after waiting much longer than I would expect to have to wait for a response. So I hit Ctrl-], i.e., the Ctrl and ] keys to return to the Telnet prompt and then exited from the telnet program.

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[/network/email/dovecot] permanent link

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