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SMTP Services

Configuring the SMTP mail sending function in the application is a very important setting, which can be used for password recovery and notification of important operations.

Due to the complexity of building a mail system, its routing configuration is subject to domain names, firewalls, routing and many other factors, making it very difficult to maintain a highly available mail system. Therefore, it is recommended to integrate a third-party SMTP service to complete the mail notification function.

SMTP providers​

The following are the SMTP service settings of the mainstream mailbox providers

SendGrid​

To configure your application to send email through SendGrid’s SMTP service, use the settings below. Replace USERNAME with your SendGrid account username and PASSWORD with your SendGrid account password.

  • SMTP host: smtp.sendgrid.net
  • SMTP port: 25 or 587 for unencrypted/TLS email, 465 for SSL-encrypted email
  • SMTP username: USERNAME
  • SMTP password: PASSWORD

Gmail​

  • Gmail SMTP server address: smtp.gmail.com
  • Gmail SMTP username: Your Gmail address (e.g. [email protected])
  • Gmail SMTP password: Your Gmail password
  • Gmail SMTP port (TLS): 587
  • Gmail SMTP port (SSL): 465
  • Gmail SMTP TLS/SSL required: yes

Remember that in addition to these email server settings, you need to let the email client receive/download mail from your Gmail account too. There's more information on that at the bottom of this page.

Outlook.com​

  • SMTP Server: smtp-mail.outlook.com
  • Username: Your full Outlook.com email address
  • Password: Your Outlook.com password
  • SMTP Port 587
  • SMTP TLS/SSL Encryption Required Yes

Hotmail​

  • Hotmail SMTP Server: smtp.live.com
  • Hotmail SMTP Username: Your complete Windows Live Hotmail email address (e.g. [email protected] or [email protected])
  • Hotmail SMTP Password: Your Windows Live Hotmail password
  • Hotmail SMTP Port: 587
  • Hotmail SMTP TLS/SSL Required: yes

Yahoo Mail​

  • Yahoo Mail SMTP server address: smtp.mail.yahoo.com
  • Yahoo Mail SMTP username: Your full Yahoo email address (including @yahoo.com)
  • Yahoo Mail SMTP password: Your Yahoo Mail password
  • Yahoo Mail SMTP port: 465 or 587
  • Yahoo Mail SMTP TLS/SSL required: yes

These settings work with most desktop, mobile, and web email programs and services. After you set up Yahoo Mail in your preferred email client, the mail and your Yahoo folders appear in both locations: in Yahoo and in your preferred app or web interface, such as Gmail.

iCloud Mail​

  • Server name:** smtp.mail.me.com**
  • SSL required: Yes
  • Port: 587
  • SMTP authentication required: Yes
  • Username: Type your full iCloud email address.
  • Password: Type an app-specific iCloud Mail password.

Zoho Mail​

  • Zoho Mail SMTP server address: smtp.zoho.com
  • Zoho Mail SMTP port: 465
  • Zoho Mail SMTP TLS/SSL required: Yes
  • Zoho Mail SMTP user name: Your Zoho Mail address ([email protected] or your email address if you use Zoho Mail with your own domain)
  • Zoho Mail SMTP password: Your Zoho Mail password

QQ Mail​

  • SMTP host: smtp.qq.com
  • SMTP port: 465 or 587 for SSL-encrypted email
  • SMTP Authentication: must be checked
  • SMTP Encryption: must SSL
  • SMTP username: email address
  • SMTP password: It is not the email account password, it is an authorisation code obtained from the QQ email console.

163 Mail​

  • SMTP host: smtp.163.com
  • SMTP port: 465 or 994 for SSL-encrypted email
  • SMTP Authentication: must be checked
  • SMTP Encryption: must SSL
  • SMTP username: email address
  • SMTP password: It is not the email account password, it is an authorisation code obtained from the 163 email console.

Aliyun Email​

  • SMTP host: smtp.mxhichina.com
  • SMTP port: 465 for SSL-encrypted email
  • SMTP Authentication: must be checked
  • SMTP Encryption: must SSL
  • SMTP username: email address
  • SMTP password: email password

Test SMTP​

However, after applying the SMTP settings, you still cannot send e-mail. In this case, you can test the availability of SMTP using the following suggestions

  • Test for availability using SMTP Test Tool

  • Use the following diagnostic path if SMTP was successfully authenticated in the previous step but still does not work in the application:

    • Run the telnet command on your server to test the SMTP network as follows

      telnet smtp.qq.com 465

      If you see 220 smtp.*.com Esmtp Mail Server or escape character is '^]', it means SMTP network is good.

    • Check that the server's Security Group does not allow external access.

    • Check if the server's iptables, firewall allow connections to external port 465.

    • Check if the OpenSSL version of the application is compatible with the SMTP service.