Could not send message to Slack.

[pwaldhauer]

Could you please help me debugging this issue? I cannot see any more information in the logs.

Newest Plugin version, Graylog 3 beta

[tekaeren]

Same issue on my setup

[luizgustavo77]

My Graylog does not have SSL and won`t send either slack alerts or test.

[laramackey]

Im getting the same problem and can't see anything I tail the logs - did any of you figure out what the issue was?

[laramackey]

Got this working - so to help anyone else I had to import the root CA and SSL Cert for slack.com in to the jvm trust store using
keytool -importcert -keystore /etc/graylog/server/cacerts.jks -storepass *********** -file slack.pem
as defined https://docs.graylog.org/en/3.1/pages/configuration/https.html#adding-a-self-signed-certificate-to-the-jvm-trust-store