new-site/infra/mta-sts/README.md

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# MTA-STS for performancewest.net
DNS TXT `_mta-sts.performancewest.net` = `v=STSv1; id=20260505` (already published).
TLS-RPT TXT `_smtp._tls.performancewest.net` published.
Added A record `mta-sts.performancewest.net -> 207.174.124.71` (Hestia).
Policy served at `https://mta-sts.performancewest.net/.well-known/mta-sts.txt`
from `/var/www/mta-sts/.well-known/mta-sts.txt` (content = mta-sts.txt here).
PENDING: Let's Encrypt cert for mta-sts.performancewest.net (waiting on HE.net
secondary DNS propagation). Once `dig +short mta-sts.performancewest.net @8.8.8.8`
resolves, run:
sudo certbot certonly --webroot -w /var/www/certbot -d mta-sts.performancewest.net --non-interactive --agree-tos -m admin@performancewest.net
then upgrade pw-mta-sts.conf to an HTTPS (443) server block (see pw-listmonk-hc.conf
pattern) and reload nginx. MTA-STS requires the policy be served over valid HTTPS.