diff --git a/config.dev.js b/config.dev.js
index 879ad8a..241a59e 100644
--- a/config.dev.js
+++ b/config.dev.js
@@ -66,10 +66,20 @@ module.exports = {
   blockApi: 'http://127.0.0.1:7101',
   // 报错重启时的邮件发送
   mails: {
+    type: 'smtp', // smtp | sendmail
     sendmailPath: '/usr/sbin/sendmail',
-    user: 'aelf.scan@aelf.io', // generated ethereal user
+    user: 'scan@domain.io', // generated ethereal user
     from: 'AElf scan <aelf.scan@aelf.io>',
     to: ['test@mail.com'],
-    subject: 'error happened when scanning'
+    subject: 'error happened when scanning', // mail subject
+    smtpConfig: {
+      host: "smtp.domain.com",
+      port: 465,
+      secure: true,
+      auth: {
+        user: "monitor@domain.com",
+        pass: "password",
+      }
+    }
   }
 };
diff --git a/config.prod.js b/config.prod.js
index 266008d..95504ed 100644
--- a/config.prod.js
+++ b/config.prod.js
@@ -57,10 +57,20 @@ module.exports = {
   },
   blockApi: 'http://127.0.0.1:7101',
   mails: {
+    type: 'smtp', // smtp | sendmail
     sendmailPath: '/usr/sbin/sendmail',
-    user: 'aelf.scan@aelf.io', // generated ethereal user
+    user: 'scan@domain.io', // generated ethereal user
     from: 'AElf scan <aelf.scan@aelf.io>',
     to: ['test@mail.com'],
-    subject: 'error happened when scanning'
+    subject: 'error happened when scanning',
+    smtpConfig: {
+      host: "smtp.domain.com",
+      port: 465,
+      secure: true,
+      auth: {
+        user: "monitor@domain.com",
+        pass: "password",
+      }
+    }
   }
 };
diff --git a/package.json b/package.json
index df6dce8..8422e2d 100644
--- a/package.json
+++ b/package.json
@@ -50,7 +50,7 @@
     "long": "^4.0.0",
     "moment": "^2.24.0",
     "mysql": "^2.17.1",
-    "nodemailer": "^6.3.0",
+    "nodemailer": "^6.8.0",
     "pm2": "^4.2.1",
     "redis": "^2.8.0"
   },
diff --git a/src/emails.js b/src/emails.js
index 74e416f..5638971 100644
--- a/src/emails.js
+++ b/src/emails.js
@@ -11,17 +11,24 @@ const mailConfig = config.mails;
 
 async function sendEmails(message = '') {
   const {
+    type,
     from,
     to,
     subject,
-    sendmailPath
+    sendmailPath,
+    smtpConfig
   } = mailConfig;
   try {
-    const transporter = nodemailer.createTransport({
-      sendmail: true,
-      newline: 'unix',
-      path: sendmailPath
-    });
+    let transporter;
+    if (type === 'smtp') {
+      transporter = nodemailer.createTransport(smtpConfig);
+    } else {
+      transporter = nodemailer.createTransport({
+        sendmail: true,
+        newline: 'unix',
+        path: sendmailPath
+      });
+    }
 
     // send mail with defined transport object
     const info = await transporter.sendMail({