What are the potential pitfalls of not setting the "sendmail_from" parameter correctly in the php.ini file when sending emails in PHP?

If the "sendmail_from" parameter is not set correctly in the php.ini file when sending emails in PHP, the sender address in the emails may be incorrect or the emails may be flagged as spam by the recipient's email server. To solve this issue, you need to set the "sendmail_from" parameter to a valid email address that matches the domain of the server.

ini_set("sendmail_from", "your_email@example.com");