Unable to get Dovecot 2.4 to allow unencrypted connection

David Koski via dovecot <[email protected]> Mon, 20 Apr 2026 16:42:51 -0700
Newsgroups gmane.mail.imap.dovecot
Message-ID <[email protected]>
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 [email protected] <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
[email protected]

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