What are common issues when sending emails with PHP, especially in terms of formatting and spam classification?

Issue: One common issue when sending emails with PHP is that the email content may not be properly formatted, leading to emails being marked as spam by email providers. To solve this, ensure that your email content follows proper HTML formatting standards and includes necessary headers. 

// Example of sending an HTML email with proper formatting and headers
$to = "recipient@example.com";
$subject = "Test HTML Email";
$message = "<html><body><h1>Hello, this is a test email!</h1></body></html>";
$headers = "MIME-Version: 1.0" . "\r\n";
$headers .= "Content-type:text/html;charset=UTF-8" . "\r\n";

// Additional headers
$headers .= 'From: Your Name <yourname@example.com>' . "\r\n";

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

Keywords

email formatting spam classification PHP mail function SMTP DKIM

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