What are best practices for configuring the php.ini file to ensure proper email sending functionality in PHP?

To ensure proper email sending functionality in PHP, it is important to configure the php.ini file with the correct settings for email handling. This includes specifying the SMTP server, setting the sendmail_path, and enabling the mail function. By properly configuring the php.ini file, PHP will be able to send emails successfully.

[mail function]
; For Win32 only.
; http://php.net/smtp
SMTP = smtp.example.com
; http://php.net/smtp-port
smtp_port = 25

; For Win32 only.
; http://php.net/sendmail-from
sendmail_from = me@example.com

; For Unix only.  You may supply arguments as well (default: "sendmail -t -i").
; http://php.net/sendmail-path
sendmail_path = "/usr/sbin/sendmail -t -i"