diff --git a/core/frontend/services/routing/EmailRouter.js b/core/frontend/services/routing/EmailRouter.js
index 15ab83d426..6c360bf5a0 100644
--- a/core/frontend/services/routing/EmailRouter.js
+++ b/core/frontend/services/routing/EmailRouter.js
@@ -26,7 +26,7 @@ class EmailRouter extends ParentRouter {
         this.router().use(this._prepareContext.bind(this));
 
         // REGISTER: actual email route
-        this.mountRoute(urlUtils.urlJoin(this.route.value, ':slug', ':options?'), controllers.email);
+        this.mountRoute(urlUtils.urlJoin(this.route.value, ':uuid', ':options?'), controllers.email);
     }
 
     /**
diff --git a/core/frontend/services/routing/controllers/email-post.js b/core/frontend/services/routing/controllers/email-post.js
index 77d32ec6da..804aeecb33 100644
--- a/core/frontend/services/routing/controllers/email-post.js
+++ b/core/frontend/services/routing/controllers/email-post.js
@@ -17,7 +17,7 @@ module.exports = function emailPostController(req, res, next) {
     const api = require('../../proxy').api[res.locals.apiVersion];
 
     const params = {
-        slug: req.params.slug,
+        uuid: req.params.uuid,
         include: 'authors,tags',
         context: {
             member: res.locals.member
diff --git a/core/server/api/canary/email-post.js b/core/server/api/canary/email-post.js
index 93ac1b4d46..da971498e9 100644
--- a/core/server/api/canary/email-post.js
+++ b/core/server/api/canary/email-post.js
@@ -12,7 +12,7 @@ module.exports = {
             'include'
         ],
         data: [
-            'slug'
+            'uuid'
         ],
         validation: {
             options: {
@@ -21,7 +21,7 @@ module.exports = {
                 }
             },
             data: {
-                slug: {
+                uuid: {
                     required: true
                 }
             }
diff --git a/test/regression/site/email_routes.test.js b/test/regression/site/email_routes.test.js
index 7ce2449d07..d1374ca343 100644
--- a/test/regression/site/email_routes.test.js
+++ b/test/regression/site/email_routes.test.js
@@ -56,7 +56,7 @@ describe('Frontend Routing: Email Routes', function () {
     });
 
     it('should display email_only post', async function () {
-        const res = await request.get(`/email/${emailPosts[0].get('slug')}/`)
+        const res = await request.get(`/email/${emailPosts[0].get('uuid')}/`)
             .expect('Content-Type', /html/)
             .expect(200);
 
@@ -71,7 +71,12 @@ describe('Frontend Routing: Email Routes', function () {
     });
 
     it('404s for draft email only post', function () {
-        return request.get(`/email/${emailPosts[1].get('slug')}/`)
+        return request.get(`/email/${emailPosts[1].get('uuid')}/`)
+            .expect(404);
+    });
+
+    it('404s known slug', function () {
+        return request.get(`/email/${emailPosts[0].get('slug')}/`)
             .expect(404);
     });