Re: Unable to get Dovecot 2.4 to allow unencrypted connection

   Hello,
   I don't know about actually fully disabling SSL requirements but I do know
   that dovecot supports logging everything in an IMAP session if that would
   also help.
   [1]https://doc.dovecot.org/2.4.3/core/admin/rawlog.html
   [2]https://doc.dovecot.org/2.4.3/core/summaries/settings.html#rawlog_dir
   Best,
   David
   On 2026-04-21, 01:44 David Koski via dovecot <dovecot@[3]dovecot.org>
   wrote:

     Hello,

     In spite of:

     ssl = no
     auth_allow_cleartext = yes

     ..in a telnet session, I get:

     * OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE
     LITERAL+ STARTTLS LOGINDISABLED AUTH=GSSAPI AUTH=CRAM-MD5] Dovecot
     (Debian) ready.
     a1 login ln@[4]zample.com <super-secret>
     * BAD [ALERT] Plaintext authentication not allowed without SSL/TLS, but
     your client did it anyway. If anyone was listening, the password was
     exposed.
     a1 NO [PRIVACYREQUIRED] Plaintext authentication disallowed on
     non-secure (SSL/TLS) connections.

     I need to see the network traffic to troubleshoot the way Outlook 2019
     handles IMAP folders.

     Regards,
     David Koski
     dkoski@[5]sutinen.com

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References

   Visible links
   1. https://doc.dovecot.org/2.4.3/core/admin/rawlog.html
   2. https://doc.dovecot.org/2.4.3/core/summaries/settings.html#rawlog_dir
   3. http://dovecot.org/
   4. http://zample.com/
   5. http://sutinen.com/
   6. http://dovecot.org/
   7. http://dovecot.org/
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