[keycloak-user] "Test connection" in Realm Settings/Email fails

Hi List I installed your official docker image 3.4.1.Final and sending emails from GUI "Users/$user/Credentials/Credential reset" failed with an exception, that can be seen in `docker logs` output: ERROR [org.keycloak.services] (default task-37) KC-SERVICES0088: Failed to send execute actions email: org.keycloak.email.EmailException: org.keycloak.email.EmailException: Please provide a valid address at org.keycloak.email.DefaultEmailSenderProvider.send(DefaultEmailSenderProvider.java:145) ... I provided and saved a from-address in the Realm-Settings of course, so I started to play around a bit trying to find the actual problem. I found another issue: Klicking on the "Test connection" button in the Realm Settings/Email tab triggers a "Status Code 400 Bad Request". Seen in my javascript console (using Chrome and Firefox browser). It is a POST request, but the Request URL contains all posted data, looking almost like a GET request would, and therefore it includes the SMTP servers password(!?), not sure if that is intended as this could end up in a web-servers logfile. Looks like this (given URL is shortened): http://127.0.0.1:6789/auth/admin/realms/Multiwave/testSMTPConnection/%7B%.... Here is the data I am POSTing (actual server/usernames changed to protect the innocent): {"realm":"Multiwave","config":"{\"password\":\"**********\",\"starttls\":true,\"auth\":true,\"port\":587,\"host\":\"smtp.example.com\",\"replyTo\":\"\",\"from\":\"sso@example.com\",\"fromDisplayName\":\"Keycloak\",\"ssl\":\"\",\"user\":\"smtp_loginname\"}"} any hints what I am doing wrong? Is this broken for somebody else using docker? Not being able to send the reset-password emails is keeping me from deploying keycloak for our users. Setting it up and implementing the authentication clients against it worked really great so far, thanks for your system! br mike