local json = require("json")
local body, err = json.decode(r.RequestBody)
if err then error(err) end
local message = "Mailgun mail delivery error! Severity: " .. body["event-data"]["severity"] .. " | Reason: " .. body["event-data"]["reason"] .. " | Resp: " .. body["event-data"]["delivery-status"]["message"] .. " | Recipient: " .. body["event-data"]["recipient"]
-- Preparing Slack payload
response_type= "in_channel",
local result, err = json.encode(slack)
if err then error(err) end
-- Set request header to application/json for Slack API
r:SetRequestHeader("Content-Type", "application/json")
-- Set modified request body