diff --git a/nixos/doc/manual/release-notes/rl-2405.section.md b/nixos/doc/manual/release-notes/rl-2405.section.md
index becfa6d45ba11..7490829df80f5 100644
--- a/nixos/doc/manual/release-notes/rl-2405.section.md
+++ b/nixos/doc/manual/release-notes/rl-2405.section.md
@@ -167,6 +167,8 @@ The pre-existing [services.ankisyncd](#opt-services.ankisyncd.enable) has been m
 
 - `xxd` has been moved from `vim` default output to its own output to reduce closure size. The canonical way to reference it across all platforms is `unixtools.xxd`.
 
+- The `stalwart-mail` package has been updated to v0.5.3, which includes [breaking changes](https://github.com/stalwartlabs/mail-server/blob/v0.5.3/UPGRADING.md).
+
 - `services.avahi.nssmdns` got split into `services.avahi.nssmdns4` and `services.avahi.nssmdns6` which enable the mDNS NSS switch for IPv4 and IPv6 respectively.
   Since most mDNS responders only register IPv4 addresses, most users want to keep the IPv6 support disabled to avoid long timeouts.
 
diff --git a/pkgs/servers/mail/stalwart/Cargo.lock b/pkgs/servers/mail/stalwart/Cargo.lock
index 9871da994f7b6..c8ee279416c8d 100644
--- a/pkgs/servers/mail/stalwart/Cargo.lock
+++ b/pkgs/servers/mail/stalwart/Cargo.lock
@@ -2551,7 +2551,7 @@ checksum = "029d73f573d8e8d63e6d5020011d3255b28c3ba85d6cf870a07184ed23de9284"
 
 [[package]]
 name = "imap"
-version = "0.5.2"
+version = "0.5.3"
 dependencies = [
  "ahash 0.8.7",
  "dashmap",
@@ -2728,7 +2728,7 @@ dependencies = [
 
 [[package]]
 name = "jmap"
-version = "0.5.2"
+version = "0.5.3"
 dependencies = [
  "aes",
  "aes-gcm",
@@ -3138,7 +3138,7 @@ dependencies = [
 
 [[package]]
 name = "mail-server"
-version = "0.5.2"
+version = "0.5.3"
 dependencies = [
  "directory",
  "imap",
@@ -3155,7 +3155,7 @@ dependencies = [
 
 [[package]]
 name = "managesieve"
-version = "0.5.2"
+version = "0.5.3"
 dependencies = [
  "ahash 0.8.7",
  "bincode",
@@ -3422,7 +3422,7 @@ dependencies = [
 
 [[package]]
 name = "nlp"
-version = "0.5.2"
+version = "0.5.3"
 dependencies = [
  "ahash 0.8.7",
  "bincode",
@@ -5385,7 +5385,7 @@ checksum = "4dccd0940a2dcdf68d092b8cbab7dc0ad8fa938bf95787e1b916b0e3d0e8e970"
 
 [[package]]
 name = "smtp"
-version = "0.5.2"
+version = "0.5.3"
 dependencies = [
  "ahash 0.8.7",
  "bincode",
@@ -5507,7 +5507,7 @@ dependencies = [
 
 [[package]]
 name = "stalwart-cli"
-version = "0.5.2"
+version = "0.5.3"
 dependencies = [
  "clap",
  "console",
@@ -5531,7 +5531,7 @@ dependencies = [
 
 [[package]]
 name = "stalwart-install"
-version = "0.5.2"
+version = "0.5.3"
 dependencies = [
  "base64 0.21.5",
  "clap",
@@ -6414,7 +6414,7 @@ checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"
 
 [[package]]
 name = "utils"
-version = "0.5.2"
+version = "0.5.3"
 dependencies = [
  "ahash 0.8.7",
  "arc-swap",
diff --git a/pkgs/servers/mail/stalwart/default.nix b/pkgs/servers/mail/stalwart/default.nix
index 7c680a53e50f7..0150434dcc1a6 100644
--- a/pkgs/servers/mail/stalwart/default.nix
+++ b/pkgs/servers/mail/stalwart/default.nix
@@ -14,7 +14,7 @@
 }:
 
 let
-  version = "0.5.2";
+  version = "0.5.3";
 in
 rustPlatform.buildRustPackage {
   pname = "stalwart-mail";
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage {
     owner = "stalwartlabs";
     repo = "mail-server";
     rev = "v${version}";
-    hash = "sha256-U53v123mLD9mGmsNKgHlad8+2vr9lzMXizT4KeOChJY=";
+    hash = "sha256-Fbw2f/Q5ZLnQi8PuxbdIxDIyDayhAzvzdn3LMexnWgA=";
     fetchSubmodules = true;
   };