How can configuration settings for Mercury Mail Server impact the functionality of the mail() function in PHP scripts?

The configuration settings for Mercury Mail Server can impact the functionality of the mail() function in PHP scripts by affecting how emails are sent and received. To ensure proper functionality, it is important to correctly configure the SMTP settings in the php.ini file to match the settings of the Mercury Mail Server.

// Set the SMTP server settings in php.ini
ini_set("SMTP", "mail.example.com");
ini_set("smtp_port", "25");