What potential limitations or restrictions may be imposed by the server provider on setting the sender address in PHP emails?

Server providers may impose limitations or restrictions on setting the sender address in PHP emails to prevent spam or abuse. To ensure compliance with these restrictions, it is recommended to use a valid email address associated with the domain hosted on the server. This helps prevent emails from being flagged as spam or rejected by the recipient's server.

// Set the sender address using a valid email address associated with the domain
$sender_email = "valid_email@yourdomain.com";
$headers = "From: $sender_email\r\n";