Let's Encrypt Ending Support for Notification Emails

[r3m8]

Let’s Encrypt will discontinue support for expiration notification emails starting June 4, 2025. The email field processed by the ACME server will no longer be supported, including for technical information about the Let’s Encrypt infrastructure. Users will have to register directly on the relevant page.

https://letsencrypt.org/2025/01/22/ending-expiration-emails/

This change necessitates several updates to the documentation, particularly concerning the email field on Let’s Encrypt-related pages.

According to RFC 8555, operator notifications are optional. However, it might be prudent to retain the email field unless Let’s Encrypt is the sole ACME-provider entity utilizing it. Here’s the relevant excerpt from the RFC :

Once the CA is satisfied, it issues the certificate, and the ACME
client automatically downloads and installs it, potentially
notifying the operator via email, SMS, etc.

What are your thoughts on potentially removing the email field from the documentation and, possibly, from the cert-manager certificate controller itself ? In any case, I think it's important to deprecate this feature in the first instance for Let's Encrypt content.

I’m happy to create a PR for this, but I believe the approval and guidance of the cert-manager maintainers are essential before proceeding with any development.

Have a great day :)