postfix

Postfix mail server

high risk

interactive breakdown — edit the command and press Explain
$ 
⚠ Risks & cautions
What it does

postfix check/reload/flush; postqueue -p lists the queue.

Examples
postqueue -pQueue · explain & risk-check →
postfix checkConfig check · explain & risk-check →
Related
journalctl
Open the full explainer →More in Web & Services

Reference text is hand-written and may be incomplete — check man postfix for your version. Test destructive commands on a non-production system first.