How to Send Emails through the SMTP Program by Alibaba Mail Accounts

Detailed Information

The SMTP protocol is used by email clients or code programs to send emails. You need to configure information such as the SMTP server and port.

SMTP Server and Port

SMTP server: smtp.sg.aliyun.com or smtp.[email domain]

SMTP server port: 25(SSL encryption port: 465)

Sample code

If you are a technical developer and need to use code to send SMTP, please refer to the sending example:

Alibaba Mail SMTP Sending Code Example

Troubleshooting

1. After configuration, the email cannot be sent. Please check according to the following suggestions:

• Check whether the account password is spelled correctly and do not contain extra characters.

• If you use the 465 port, please select Enable SSL.

• Check whether the server is correct.

• By default, the SMTP sending function is enabled. If the SMTP sending function is not enabled, see Enable the Alibaba Mail SMTP Sending Function.

2. If you need to verify whether the configuration information such as server address, port, account, and password is correct, you can use this parameter to configure it on other third-party clients.

If the email client can be used to successfully send SMTP emails, but the program used to send emails cannot be successfully delivered, you must check whether there is other logic from the program used to send messages. The possible reasons are as follows.

• SMTP server configuration error.

• The port 25 selected for SMTP sending is not open (SSL encryption port is 465).

• Check whether the logic of the sending code is correct. It is recommended to write dead parameters and perform a sending test first.

References

Enable the SMTP Sending Service

Log on to the Alibaba Mail by postmaster account and enter the domain Management page by default. Choose DEPTs & Users > Employee Accounts. Click the account name, select Enable POP3/SMTP and Enable IMAP/SMTP, and then click Save.