Keycloak integration with roundcube

[4m3n]

Hello there,
I was using ISPConfig3 with roundcube(v1.6). I add keycloak as oauth provider and fill the required fields. After a successful authentication in keycloak it leads me to login page again with "login error" message. when i try to see logs i get these logs:

<9sicllrb> IMAP Error: Login failed for johndoe@example.local against localhost from 10.123.5.5. AUTHENTICATE XOAUTH2: A0001 NO [ALERT] Unsupported authentication mechanism. in /usr/share/roundcube/program/lib/Roundcube/rcube_imap.php on line 201.

Is there any one who can help me?

regards,

[alec]

You have to make your IMAP and SMTP servers know how to authenticate a user using an OAuth token.