I’m running Dovecot 2.3.21.1 using Authentik for OAuth authentication. I’m using SOGo 5.12.0 as a UI, also with OAuth authentication.  When SOGo connects to Dovecot and authenticates with OAuth, it fails and the following is logged:

imap-login: Info: Disconnected: Input buffer full (no auth attempts in 0 secs): user=<>, rip=10.42.1.1, lip=10.42.1.196, TLS, session=<NZnp7zMxQuMKKgEB>

My dovecot-oauth2.conf.ext looks like this: openid_configuration_url = https://auth.koehn.com/application/o/dovecot-oauth2/.well-known/openid-confi... introspection_url = https://auth.koehn.com/application/o/introspect/

introspection_mode = post

client_id = [redacted] client_secret = [redacted] username_attribute = email 

debug = yes

rawlog_dir = /tmp/oauth2

And my auth-oauth2.conf.ext looks like this: passdb {

  driver = oauth2 mechanisms = xoauth2 oauthbearer args = /etc/dovecot/conf.d/dovecot-oauth2.conf.ext }

I’m using the Dovecot Debian packages from repo.dovecot.org. 

I’ve tried auth for introspection_mode, to no avail. There’s nothing extra in the logs when I turn on debug, and there’s nothing logged in the /tmp/oauth2 directory either, FWIW. 

Any ideas?

— Brad

I’m running Dovecot 2.3.21.1 using Authentik for OAuth authentication. I’m using SOGo 5.12.0 as a UI, also with OAuth authentication.

When SOGo connects to Dovecot and authenticates with OAuth, it fails and the following is logged:

imap-login: Info: Disconnected: Input buffer full (no auth attempts in 0 secs): user=<>, rip=10.42.1.1, lip=10.42.1.196, TLS, session=<NZnp7zMxQuMKKgEB>

My dovecot-oauth2.conf.ext looks like this: openid_configuration_url = https://auth.koehn.com/application/o/dovecot- oauth2/.well-known/openid-configuration introspection_url = https://auth.koehn.com/application/o/introspect/ introspection_mode = post client_id = [redacted] client_secret = [redacted] username_attribute = email debug = yes rawlog_dir = /tmp/oauth2

And my auth-oauth2.conf.ext looks like this: passdb { driver = oauth2 mechanisms = xoauth2 oauthbearer args = /etc/dovecot/conf.d/dovecot-oauth2.conf.ext }

I’m using the Dovecot Debian packages from repo.dovecot.org.

I’ve tried auth for introspection_mode, to no avail. There’s nothing extra in the logs when I turn on debug, and there’s nothing logged in the /tmp/ oauth2 directory either, FWIW.

Any ideas?

— Brad