Tracks the rehab pool (rehab02-04 / .91-.93) delivery + bounce + Spamhaus ZEN
DNSBL status in the daily report and alert body. Alerts only if a rehab IP lands
on a DNSBL or rehab delivery drops <40% with real volume (recipient quality
slipped) -- a recovering IP naturally bounces more so the threshold is lenient.
End-of-day (20:00 Central) check of campaign deliverability across both sending
pools (main out05-09 + healthcare hcout). Sends a Telegram alert ONLY when there
is a reputation problem -- delivery below 65% or a spam/policy-block (550-5.7.1)
spike above 150/day -- so healthy days stay silent. Reuses the existing
TELEGRAM_BOT_TOKEN/CHAT_ID from /opt/performancewest/.env. Logs every run to
/var/log/pw-warmup-healthcheck.log for history. Excludes internal/probe noise so
the delivery figure reflects real external recipients.
