The delivery router truncated cron output above 4000 chars and appended a footer pointing at a file on the gateway host, which an email recipient cannot open. One email carries the whole body, so declare splits_long_messages and let the router hand over the full payload. Fixes #61990 Co-authored-by: Petra <petra.kersten@agentmail.to> Co-authored-by: liuhao1024 <sunsky.lau@gmail.com>