diff --git a/assets/js/email.js b/assets/js/email.js
index 16017543..4d45f4cf 100644
--- a/assets/js/email.js
+++ b/assets/js/email.js
@@ -1,11 +1,12 @@
 (function () {
   const links = document.querySelectorAll(".email-link");
   links.forEach((link) => {
-    const email = atob(link.getAttribute("data-email"));
+    let email = atob(link.getAttribute("data-email"));
     const subject = link.getAttribute("data-subject");
-    let mailto = "mailto:" + email;
+    let mailto = email.startsWith("mailto:") ? email : "mailto:" + email;
+
     if (subject) {
-      mailto += "?subject=" + encodeURIComponent(subject);
+      mailto += (mailto.includes("?") ? "&" : "?") + "subject=" + encodeURIComponent(subject);
     }
     link.href = mailto;
   });