Select a channel in Slack that you want messages to be sent to
Click Add Incoming WebHooksintegration
Slack will generate a Webhook URL for the integration. Copy this URL as you will need it shortly. At this point you can also customize the name, description and icon used by the integration. Save changes when done.
Configure Slack Transport in JEMH
Go JEMH > Notifications and select the Slack transport tab. Click New Transport Config.
Paste the Webhook URL that you copied from Slack into the Webhook field. If you wish, enter a description and a message that will be sent on saving on the configuration (to verify the webhook works).
If you already have a Project Mapping created, skip ahead to the Select event templates step. If you do not have any Project Mappings, create one by clicking New ProjectMapping.
Enter the key of the project that you want to integrate with Slack, and save your changes.
Select event templates
Ensure that you are on the Slack transport tab under Transports. Then, edit your project mapping.
Select the transport configuration that you created earlier. Then, select a template for the issue event that you want a message to be sent to Slack for. Save your changes.
Now, when an issue event is fired for the project (and that event type has a template selected), the configured Slack channel will receive a message for it.