diff --git a/modules/nixos/mail-server/mobileconfig-generator.py b/modules/nixos/mail-server/mobileconfig-generator.py
index 0bbcd46..7247c9b 100644
--- a/modules/nixos/mail-server/mobileconfig-generator.py
+++ b/modules/nixos/mail-server/mobileconfig-generator.py
@@ -1,15 +1,4 @@
 #!/usr/bin/env python3
-"""Apple mobileconfig profile generator HTTP server.
-
-Example:
-    ./mobileconfig-generator.py \\
-        --domain billenius.com \\
-        --mail-host mail.billenius.com \\
-        --radicale-host cal.billenius.com \\
-        --account love:love@billenius.com:love_billenius.com \\
-        --port 8426
-"""
-
 import argparse
 import hashlib
 import re
@@ -98,7 +87,9 @@ def resolve_account(params):
 
 def deterministic_uuid(seed):
     digest = hashlib.sha256(seed.encode("utf-8")).hexdigest()
-    return f"{digest[:8]}-{digest[8:12]}-{digest[12:16]}-{digest[16:20]}-{digest[20:32]}"
+    return (
+        f"{digest[:8]}-{digest[8:12]}-{digest[12:16]}-{digest[16:20]}-{digest[20:32]}"
+    )
 
 
 def mobileconfig_payload(email, full_name):
@@ -219,7 +210,7 @@ def mobileconfig_payload(email, full_name):
     <key>PayloadDescription</key>
     <string>Configures mail, calendar, and contacts for {values["email"]}.</string>
     <key>PayloadDisplayName</key>
-    <string>{values["domain"]} Mail</string>
+    <string>{values["email"]}</string>
     <key>PayloadIdentifier</key>
     <string>com.billenius.mobileconfig.{values["identifier"]}</string>
     <key>PayloadOrganization</key>
@@ -388,7 +379,10 @@ class Handler(BaseHTTPRequestHandler):
         payload = mobileconfig_payload(account["email"], full_name).encode("utf-8")
         self.send_response(200)
         self.send_header("Content-Type", "application/x-apple-aspen-config")
-        self.send_header("Content-Disposition", f'attachment; filename="{filename_base}.mobileconfig"')
+        self.send_header(
+            "Content-Disposition",
+            f'attachment; filename="{filename_base}.mobileconfig"',
+        )
         self.send_header("Content-Length", str(len(payload)))
         self.end_headers()
         self.wfile.write(payload)
@@ -409,7 +403,10 @@ class Handler(BaseHTTPRequestHandler):
         if parsed.path in ("/mobileconfig/", "/mobileconfig/index.html"):
             account = resolve_account(params)
             if account is None:
-                has_query = any(first(params.get(key)) for key in ("username", "user", "emailaddress"))
+                has_query = any(
+                    first(params.get(key))
+                    for key in ("username", "user", "emailaddress")
+                )
                 if has_query:
                     self.send_text("Unknown account", status=404)
                 else:
@@ -432,8 +429,10 @@ class Handler(BaseHTTPRequestHandler):
             self.send_profile(account, full_name, "billenius")
             return
 
-        if parsed.path.startswith("/mobileconfig/") and parsed.path.endswith(".mobileconfig"):
-            basename = parsed.path[len("/mobileconfig/"):-len(".mobileconfig")]
+        if parsed.path.startswith("/mobileconfig/") and parsed.path.endswith(
+            ".mobileconfig"
+        ):
+            basename = parsed.path[len("/mobileconfig/") : -len(".mobileconfig")]
             account = ACCOUNT_BY_PATH.get(basename)
             if account is None:
                 self.send_text("Unknown account", status=404)
@@ -455,7 +454,11 @@ if __name__ == "__main__":
     parser.add_argument("--radicale-host", required=True)
     parser.add_argument("--default-username", default=None)
     parser.add_argument("--port", type=int, default=8426)
-    parser.add_argument("--account", type=parse_account, action="append",
-                        help="username:email:legacyPath (repeatable)")
+    parser.add_argument(
+        "--account",
+        type=parse_account,
+        action="append",
+        help="username:email:legacyPath (repeatable)",
+    )
     init(parser.parse_args())
     ThreadingHTTPServer(("127.0.0.1", PORT), Handler).serve_forever()
diff --git a/modules/nixos/mail-server/mobileconfig.nix b/modules/nixos/mail-server/mobileconfig.nix
index a4ffd58..5a1c756 100644
--- a/modules/nixos/mail-server/mobileconfig.nix
+++ b/modules/nixos/mail-server/mobileconfig.nix
@@ -17,22 +17,21 @@ lib.mkIf hasMailDiscoveryConfig (
 
     safeLegacyPath = email: builtins.replaceStrings [ "@" "+" ] [ "_" "-" ] email;
 
-    accountEntries =
-      lib.filter (entry: entry.domain == domain) (
-        lib.mapAttrsToList (
-          email: _:
-          let
-            parts = lib.splitString "@" email;
-            username = builtins.head parts;
-            domainPart = lib.last parts;
-          in
-          {
-            inherit email username;
-            domain = domainPart;
-            legacyPath = safeLegacyPath email;
-          }
-        ) cfg.loginAccounts
-      );
+    accountEntries = lib.filter (entry: entry.domain == domain) (
+      lib.mapAttrsToList (
+        email: _:
+        let
+          parts = lib.splitString "@" email;
+          username = builtins.head parts;
+          domainPart = lib.last parts;
+        in
+        {
+          inherit email username;
+          domain = domainPart;
+          legacyPath = safeLegacyPath email;
+        }
+      ) cfg.loginAccounts
+    );
 
     usernames = map (entry: entry.username) accountEntries;
     defaultUsername =
@@ -40,8 +39,8 @@ lib.mkIf hasMailDiscoveryConfig (
 
     generatorScript = ./mobileconfig-generator.py;
 
-    accountArgs = lib.concatMapStrings (entry:
-      " --account ${entry.username}:${entry.email}:${entry.legacyPath}"
+    accountArgs = lib.concatMapStrings (
+      entry: " --account ${entry.username}:${entry.email}:${entry.legacyPath}"
     ) accountEntries;
 
     defaultUsernameArg =
@@ -61,7 +60,12 @@ lib.mkIf hasMailDiscoveryConfig (
       wantedBy = [ "multi-user.target" ];
       serviceConfig = {
         DynamicUser = true;
-        ExecStart = "${pkgs.python3}/bin/python3 ${generatorScript} --domain ${domain} --mail-host ${cfg.fqdn} --radicale-host ${radicaleHost} --port ${toString mobileconfigPort}${defaultUsernameArg}${accountArgs}";
+        ExecStart = "${pkgs.python3}/bin/python3 \
+            ${generatorScript} \
+            --domain ${domain} \
+            --mail-host ${cfg.fqdn} \
+            --radicale-host ${radicaleHost} \
+            --port ${toString mobileconfigPort}${defaultUsernameArg}${accountArgs}";
         NoNewPrivileges = true;
         PrivateTmp = true;
         ProtectHome = true;