Wordpress itself comes with the PHPMailer class, but it simply calls the Linux mail function to send mail. This can easily lead to the other party not receiving or entering the trash. So we need to configure PHPMailer to let it send mail using SMTP.

# Installing WP Mail SMTP

The most important thing on Wordpress is the plugin. After a simple trial: WP Mail SMTP can be said to be the best one. It resets WordPress's wp_mail() function to enable it to send mail using SMTP, and has a friendly setup interface that lets you enter SMTP information. Go to Wordpress Dashboard > Plugins > Install Plugins > Enter mailSMTP > Find WP mail SMTP and install.

# Setting up plugins

After installation, go to the plugin list and click the setting under WP mail SMTP to set the plugin.

From Email: Fill in the outgoing address From Name: Fill in the sender's name Mailer: Select other SMTP

In the other SMTP settings field, enter the SMTP server configuration information.

SMTP Host: Fill in the SMTP server address. QQ mailbox is smtp.qq.com; Google mailbox is smtp.gmail.com; Hotmail mailbox is smtp.live.com; 126 mailbox is smtp.126.com. SMTP Port: Fill in the port. The default port is 25 here. QQ mailbox, 126 mailbox is 25 (I am SSL encryption so it is 465); Google mailbox is 587. Encryption: Select the encryption method. I choose SSL encryption here, and TLS for Hotmail mailbox encryption. Authentication: The authentication point is up to ON. Finally enter your username and password and click "Save Settings".

# Test Results

Go back to the top of the page and enter your email address in the "Send To" field on the "Email test" page. Click on "Send Email". A prompt will appear:

Indicates that the setting was successful and the message has been sent. Then enter your mailbox to check if the test email is received.