What resources or guides are available for troubleshooting PHP email sending issues?

One common issue when sending emails with PHP is that they may not be delivered or end up in the recipient's spam folder. To troubleshoot this, check if the email headers are set correctly, the SMTP server settings are accurate, and the email content is not flagged as spam. Additionally, make sure that the "From" address is a valid email address. 

// Example PHP code snippet to set proper headers and send an email using SMTP

$to = "recipient@example.com";
$subject = "Test Email";
$message = "This is a test email.";

$headers = "From: sender@example.com\r\n";
$headers .= "Reply-To: sender@example.com\r\n";
$headers .= "MIME-Version: 1.0\r\n";
$headers .= "Content-Type: text/html; charset=ISO-8859-1\r\n";

// Set SMTP settings
ini_set("SMTP", "smtp.example.com");
ini_set("smtp_port", "25");

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

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

Keywords

SMTP PHPMailer error logs SPF DKIM

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