SMTP Probes
Active synthetic probing of the relay's SMTP endpoints (ports 25 / 465 / 587): TCP latency, banner, EHLO capabilities, STARTTLS / TLS certificate expiry, and AUTH advertisement. Targets come from MXS_PROBE_* / RELAY_*.
Active synthetic probing of the relay's SMTP endpoints (ports 25 / 465 / 587): TCP latency, banner, EHLO capabilities, STARTTLS / TLS certificate expiry, and AUTH advertisement. Targets come from MXS_PROBE_* / RELAY_*.