diff --git a/core/server/services/members/middleware.js b/core/server/services/members/middleware.js
index f477856e56..7e7d555553 100644
--- a/core/server/services/members/middleware.js
+++ b/core/server/services/members/middleware.js
@@ -90,7 +90,12 @@ const updateMemberData = async function (req, res) {
 
 const getMemberSiteData = async function (req, res) {
     const isStripeConfigured = membersService.config.isStripeConnected();
-
+    const domain = urlUtils.urlFor('home', true).match(new RegExp('^https?://([^/:?#]+)(?:[/:?#]|$)', 'i'));
+    const blogDomain = domain && domain[1];
+    let supportAddress = settingsCache.get('members_support_address');
+    if (!supportAddress.includes('@')) {
+        supportAddress = `${supportAddress}@${blogDomain}`;
+    }
     const response = {
         title: settingsCache.get('title'),
         description: settingsCache.get('description'),
@@ -108,7 +113,7 @@ const getMemberSiteData = async function (req, res) {
         portal_button_icon: settingsCache.get('portal_button_icon'),
         portal_button_signup_text: settingsCache.get('portal_button_signup_text'),
         portal_button_style: settingsCache.get('portal_button_style'),
-        members_support_address: settingsCache.get('members_support_address')
+        members_support_address: supportAddress
     };
 
     // accent_color is currently an experimental feature