What is the significance of the RFC 2822 compliance error in Swift Mailer?

The RFC 2822 compliance error in Swift Mailer occurs when the email headers do not adhere to the RFC 2822 standard, causing delivery issues or rejection by some email servers. To solve this issue, you can ensure that the email headers are properly formatted according to the RFC 2822 standard. 

$message = (new Swift_Message())
    ->setSubject('Example Subject')
    ->setFrom(['sender@example.com' => 'Sender Name'])
    ->setTo(['recipient@example.com' => 'Recipient Name'])
    ->setBody('Example email body');

$headers = $message->getHeaders();
$headers->addTextHeader('Date', date('r'));
$headers->addTextHeader('Message-ID', '<' . md5(uniqid()) . '@example.com>');

// Send the email
$mailer = new Swift_Mailer(new Swift_SmtpTransport('localhost', 25));
$mailer->send($message);

Keywords

RFC 2822 compliance error Swift Mailer PHP email validation

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