Open the WordPress backend - Go to Appearance - Theme Settings - You can see the "SMTP Settings" of Msimple, as shown in the figure below.

SMTP Settings

WordPress defaults to using the mail() function to send emails, but most hosting providers disable this function. The mail() function has a low success rate and is vulnerable to abuse. Operations such as comment notifications and password recovery require email notifications, so it is recommended to use SMTP to send emails, which is more stable and reliable.

Note: If you are already using another SMTP plugin, please do not enable the Msimple theme's SMTP function (disabled by default). In short, either use a plugin to implement SMTP or use the SMTP sending settings provided by the Msimple theme (recommended).

The SMTP server addresses and ports for commonly used email providers are as follows:

Notes

• Before using SMTP, please make sure that you have enabled the SMTP function in the backend of your email provider.
• Most email providers require you to set a separate password for SMTP (Note: not the same as your email login password).
• Some hosting providers block the outgoing port 25, so it is recommended to use port 465 with SSL.
• Any error in the SMTP settings will result in the inability to send emails. It is recommended to test the email information in a local email client such as Foxmail before setting up the SMTP, to ensure that the email information is correct.