Allow self signed cert for stalwart

This commit is contained in:
Greg Kilmer
2026-07-07 22:10:17 -04:00
parent e7c5e9d66e
commit 59bcf495bf
3 changed files with 31 additions and 0 deletions
+18
View File
@@ -25,6 +25,7 @@ delivery, set **either** SMTP vars **or** `CONTACT_WEBHOOK_URL` (see
| `SITE_URL` | Canonical URL for metadata | `https://gregkilmer.com` |
| `SMTP_HOST` / `SMTP_PORT` / `SMTP_USER` / `SMTP_PASS` | SMTP relay | unset |
| `SMTP_FROM` | From address for outgoing mail | derived from `SITE_URL` |
| `SMTP_ALLOW_SELFSIGNED` | Accept self-signed cert (internal hop) | `false` |
| `CONTACT_TO` | Inbox that receives submissions | `contact@gregkilmer.com` |
| `CONTACT_WEBHOOK_URL` | JSON webhook fallback (Discord/Slack/n8n) | unset |
| `CONTACT_RATE_LIMIT` / `CONTACT_RATE_WINDOW_MIN` | Per-IP rate limit | `5` / `15` |
@@ -123,6 +124,23 @@ not `gmail.com` — SPF on a domain you don't own will reject or sink the mail.
Test delivery + spam score with [mail-tester.com](https://www.mail-tester.com/)
(send a form submission to the unique address it gives you).
#### Self-signed certificates on an internal relay
If the SMTP relay (e.g. Stalwart) is on the same private Docker network as the
site container and presents a self-signed TLS certificate, nodemailer's default
certificate verification will reject the connection with
`Error: self-signed certificate` (`code: ESOCKET`). For a trusted internal hop
that never traverses an untrusted network, set:
```
SMTP_ALLOW_SELFSIGNED=true
```
This disables TLS certificate verification for the SMTP connection only. It is
`false` by default; only enable it when the relay is on a trusted private
network. For a relay reachable over the public internet, prefer installing a
real certificate (Let's Encrypt) on the relay instead.
### Cloudflare Turnstile (bot protection)
The form includes an invisible Cloudflare Turnstile challenge. To enable it: