How can developers ensure that emails sent from their server do not end up in spam filters when using PHP for form submissions?

To ensure that emails sent from a server using PHP for form submissions do not end up in spam filters, developers can set up proper email headers, use a reputable email service provider, authenticate their domain with SPF and DKIM records, and avoid sending spammy content. Additionally, it's important to regularly monitor email deliverability and maintain a good sender reputation. 

// Set proper email headers
$headers = "From: Your Name <youremail@example.com>\r\n";
$headers .= "Reply-To: youremail@example.com\r\n";
$headers .= "MIME-Version: 1.0\r\n";
$headers .= "Content-Type: text/html; charset=ISO-8859-1\r\n";

// Send email
$mail_sent = mail($to, $subject, $message, $headers);

if($mail_sent) {
    echo "Email sent successfully.";
} else {
    echo "Email sending failed.";
}

Keywords

PHP email spam filters deliverability headers

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