diff --git a/services/mail.nix b/services/mail.nix
index cb95719..9464f15 100644
--- a/services/mail.nix
+++ b/services/mail.nix
@@ -71,6 +71,11 @@
         hashedPassword =
           "$6$uaD8bRcT1$gFqhFyu5RUsyUUOG5b.kN.JAJ1rVHvaYhpeRHoMvrERAMgBu1FHu2oDnjTsy.5NKoLc5xpI5uv4Gpy4YbmDmV.";
       };
+
+      "mattermost@hacc.space" = {
+        hashedPassword =
+          "$6$uaD8bRcT1$gFqhFyu5RUsyUUOG5b.kN.JAJ1rVHvaYhpeRHoMvrERAMgBu1FHu2oDnjTsy.5NKoLc5xpI5uv4Gpy4YbmDmV.";
+      };
     };
 
     extraVirtualAliases = {