diff --git a/core/server/api/canary/email-preview.js b/core/server/api/canary/email-preview.js
index 36566e2d72..13ac07b2be 100644
--- a/core/server/api/canary/email-preview.js
+++ b/core/server/api/canary/email-preview.js
@@ -58,9 +58,8 @@ module.exports = {
                     message: common.i18n.t('errors.api.posts.postNotFound')
                 });
             }
-            const post = model.toJSON();
             const {emails = []} = frame.data;
-            const response = await mega.mega.sendTestEmail(post, emails);
+            const response = await mega.mega.sendTestEmail(model, emails);
             if (response && response[0] && response[0].error) {
                 throw new common.errors.EmailError({
                     message: response[0].error.message
diff --git a/core/server/services/mega/mega.js b/core/server/services/mega/mega.js
index 820378b79a..7daf0d5aee 100644
--- a/core/server/services/mega/mega.js
+++ b/core/server/services/mega/mega.js
@@ -34,7 +34,8 @@ const sendEmail = async (post, members) => {
     return bulkEmailService.send(emailTmpl, emails, emailData);
 };
 
-const sendTestEmail = async (post, emails) => {
+const sendTestEmail = async (postModel, emails) => {
+    const post = await serialize(postModel);
     const {emailTmpl} = getEmailData(post);
     const emailData = emails.reduce((emailData, email) => {
         return Object.assign({