docs: built in smtp provider warning (#10958)

Added a warning to mention that the built in SMTP provider is for
testing only, not production.

**Context:** Customers often complain about email delivery delays while
using the built in SMTP provider, and they should configure their own.
This commit is contained in:
Federico Coppede
2025-10-25 10:03:56 +00:00
committed by GitHub
parent 74fc58cb36
commit 44b7f1013f
@@ -95,6 +95,13 @@ You can configure many SMTP providers using templates for popular providers. The
You have to activate your SMTP provider so Zitadel can use it to send your emails. Only one provider can be active.
:::
:::warning
The built-in SMTP provider is intended **only for testing and evaluation purposes**.
Email delivery through this service may be **delayed or temporarily unstable**.
For any **production setup**, you must configure your own SMTP provider to ensure reliable and consistent email delivery.
:::
Go to the ZITADEL [customer portal](https://zitadel.cloud) to configure a custom domain.
To configure your custom SMTP please fill the following fields: