diff --git a/src/mailer.js b/src/mailer.js
index 40d92c3cf..6bc9b649e 100644
--- a/src/mailer.js
+++ b/src/mailer.js
@@ -195,7 +195,7 @@ async function backupFailed(mailTo, errorMessage, logUrl) {
         from: mailConfig.notificationFrom,
         to: mailTo,
         subject: `[${mailConfig.cloudronName}] Failed to backup`,
-        text: render('backup_failed.ejs', { cloudronName: mailConfig.cloudronName, message: errorMessage, logUrl, format: 'text' })
+        text: render('backup_failed.ejs', { cloudronName: mailConfig.cloudronName, message: errorMessage, logUrl })
     };
 
     await sendMail(mailOptions);
@@ -212,7 +212,7 @@ async function certificateRenewalError(mailTo, domain, message) {
         from: mailConfig.notificationFrom,
         to: mailTo,
         subject: `[${mailConfig.cloudronName}] Certificate renewal error`,
-        text: render('certificate_renewal_error.ejs', { domain: domain, message: message, format: 'text' })
+        text: render('certificate_renewal_error.ejs', { domain, message })
     };
 
     await sendMail(mailOptions);
@@ -229,7 +229,7 @@ async function sendTestMail(domain, email) {
         from: `"${mailConfig.cloudronName}" <no-reply@${domain}>`,
         to: email,
         subject: `[${mailConfig.cloudronName}] Test Email`,
-        text: render('test.ejs', { cloudronName: mailConfig.cloudronName, format: 'text'}),
+        text: render('test.ejs', { cloudronName: mailConfig.cloudronName}),
         html: render('test-html.ejs', { cloudronName: mailConfig.cloudronName })
     };