Why am I unable to connect to IMAP server with IMAP Mailbox tool?

[yuelu]

I am trying to index a mailbox on Dovecot IMAP server, but running into some SSL errors. I am able to connect to it from a mail client through port 143, using "STARTTLS". But I am not sure what to use for "useSSL" value in the imap.conf file.

When I set "useSSL=true", I got the following error:

 File "/opt/splunk/lib/python2.7/ssl.py", line 808, in do_handshake
    self._sslobj.do_handshake()
SSLError: [SSL: UNKNOWN_PROTOCOL] unknown protocol (_ssl.c:603)
None

When I set "useSSL=false", I got:

DEBUG:root:[PRIVACYREQUIRED] Plaintext authentication disallowed on non-secure (SSL/TLS) connections.
Traceback (most recent call last):
  File "bin/get_imap_email.py", line 340, in getMail
    M.login(self.user, self.password)
  File "/opt/splunk/lib/python2.7/imaplib.py", line 520, in login
    raise self.error(dat[-1])
error: [PRIVACYREQUIRED] Plaintext authentication disallowed on non-secure (SSL/TLS) connections.
None

Does this app support STARTTLS?

Thanks.

[yuelu]

Requested to turn on ssl and use ssl port resolved the problem.