How to send to BCC address when using PHPMailer to format MIME message for Gmail API?
PHPMailer will track the BCC recipients internally and if you were to send the message with PHPMailer it would specify the BCC recipients during the SMTP envelope. However, when you extract the raw message from PHPMailer you lose the internal recipient list that PHPMailer was tracking. The raw message does not include the BCC information. … Read more