diff --git a/start.sh b/start.sh
index 337dc68..4248c2d 100755
--- a/start.sh
+++ b/start.sh
@@ -684,6 +684,123 @@ sync_dir "$APP_DIR/server/mail-templates" "$MUSEUM_RUNTIME_DIR/mail-templates"
 sync_dir "$APP_DIR/server/assets" "$MUSEUM_RUNTIME_DIR/assets"
 sync_dir "$APP_DIR/data" "$MUSEUM_RUNTIME_DIR/data"
 
+customize_mail_templates() {
+  local base_template="$MUSEUM_RUNTIME_DIR/mail-templates/base.html"
+  if [ ! -f "$base_template" ]; then
+    return
+  fi
+  cat > "$base_template" <<EOF_BASE_TEMPLATE
+{{define "base"}}
+<!DOCTYPE html>
+<html>
+<meta content="text/html; charset=utf-8" />
+<meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1" />
+<style>
+  body {
+    background-color: #f0f1f3;
+    font-family: "Helvetica Neue", "Segoe UI", Helvetica, sans-serif;
+    font-size: 16px;
+    line-height: 27px;
+    margin: 0;
+    color: #444;
+  }
+
+  pre {
+    background: #f4f4f4f4;
+    padding: 2px;
+  }
+
+  table {
+    width: 100%;
+    border: 1px solid #ddd;
+  }
+
+  table td {
+    border-color: #ddd;
+    padding: 5px;
+  }
+
+  .wrap {
+    background-color: #fff;
+    padding: 30px;
+    max-width: 525px;
+    margin: 0 auto;
+    border-radius: 5px;
+  }
+
+  .button {
+    background: #0055d4;
+    border-radius: 3px;
+    text-decoration: none !important;
+    color: #fff !important;
+    font-weight: bold;
+    padding: 10px 30px;
+    display: inline-block;
+  }
+
+  .button:hover {
+    background: #111;
+  }
+
+  .footer {
+    text-align: center;
+    font-size: 12px;
+    color: #888;
+    padding: 16px;
+  }
+
+  .gutter {
+    padding: 30px;
+  }
+
+  img {
+    max-width: 100%;
+    height: auto;
+  }
+
+  a {
+    color: #0055d4;
+  }
+
+  a:hover {
+    color: #111;
+  }
+
+  @media screen and (max-width: 600px) {
+    .wrap {
+      max-width: auto;
+    }
+    .gutter {
+      padding: 10px;
+    }
+  }
+</style>
+
+<body>
+<div class="gutter" style="padding: 4px">&nbsp;</div>
+<div class="wrap" style="background-color: #ffffff; padding: 2px 30px 30px 30px; max-width: 525px; margin: 0 auto; border-radius: 5px; font-size: 16px;">
+  <main>
+    {{block "content" .}} Default Content {{end}}
+  </main>
+</div>
+<br />
+<div class="footer">
+  <p style="margin-bottom: 4px;">
+    <strong><a href="$BASE_URL" target="_blank" style="color: #555;">$BASE_URL</a></strong>
+  </p>
+  <p style="margin: 0;">
+    This email was sent by a self-hosted instance of the open source Ente application.
+  </p>
+</div>
+</body>
+</html>
+{{end}}
+EOF_BASE_TEMPLATE
+  chown cloudron:cloudron "$base_template"
+}
+
+customize_mail_templates
+
 if [ ! -x "$MUSEUM_BIN" ]; then
   log ERROR "Museum binary not found at $MUSEUM_BIN"
   exit 1
