diff --git a/doc/release-notes/rl-2605.section.md b/doc/release-notes/rl-2605.section.md
index 6c126a48f7d3..63aa05f13cc5 100644
--- a/doc/release-notes/rl-2605.section.md
+++ b/doc/release-notes/rl-2605.section.md
@@ -111,6 +111,8 @@
   retained for packages that have not completed migration. `asio_1_10` has been removed as no packages depend on it anymore.
   `asio` also no longer propagates `boost` as it is used independent from `boost` in most cases.
 
+- `stalwart-mail` has been renamed to `stalwart`
+
 - Ethercalc and its associated module have been removed, as the package is unmaintained and cannot be installed from source with npm now.
 
 - `coreth` has been removed, as upstream has moved it into `avalanchego`.
diff --git a/nixos/doc/manual/release-notes/rl-2605.section.md b/nixos/doc/manual/release-notes/rl-2605.section.md
index 8f099ccfb873..adf24f956836 100644
--- a/nixos/doc/manual/release-notes/rl-2605.section.md
+++ b/nixos/doc/manual/release-notes/rl-2605.section.md
@@ -75,6 +75,11 @@ of pulling the upstream container image from Docker Hub. If you want the old beh
 }
 ```
 
+- `services.stalwart-mail` has been renamed to `services.stalwart` to align with upstream re-brand as an e-mail and collaboration server. Other notable breaking changes to module:
+
+  - `systemd.services.stalwart` owned by `stalwart:stalwart`. The `user` and `group` are configurable via `services.stalwart.user` and `services.stalwart.group`, respectively. By default, if `stateVersion` is older than `26.05`, will fallback to legacy value of `stalwart-mail` for both `user` and `group`.
+  - Default value for `services.stalwart.dataDir` has changed to `/var/lib/stalwart`. If `stateVersion` is older than `26.05`, will fallback to legacy value of `/var/lib/stalwart-mail`.
+
 - Ethercalc and its associated module have been removed, as the package is unmaintained and cannot be installed from source with npm now.
 
 - `services.cgit` before always had the git-http-backend and its "export all" setting enabled, which sidestepped any access control configured in cgit's settings. Now you have to make a decision and either enable or disable `services.cgit.gitHttpBackend.checkExportOkFiles` (or disable the git-http-backend).