What potential issues could arise when using PHP mailer to send activation links in a registration system?

One potential issue that could arise when using PHP mailer to send activation links in a registration system is that the email might end up in the recipient's spam folder. To solve this issue, you can set the proper headers in the email to indicate that it is not spam. 

// Set the email headers to prevent the email from being marked as spam
$headers = "From: Your Name <your.email@example.com>\r\n";
$headers .= "Reply-To: Your Name <your.email@example.com>\r\n";
$headers .= "MIME-Version: 1.0\r\n";
$headers .= "Content-Type: text/html; charset=ISO-8859-1\r\n";

// Send the email with the proper headers
$mailer->send($recipient, $subject, $message, $headers);

Keywords

PHP mailer activation links registration system email delivery spam folder

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