prepareAddresses example

    private function getPayload(Email $email, Envelope $envelope): array
    {
        $sender = $envelope->getSender();

        $payload = [
            'from' => array_filter([
                'email' => $sender->getAddress(),
                'name' => $sender->getName(),
            ]),
            'to' => $this->prepareAddresses($this->getRecipients($email, $envelope)),
            'subject' => $email->getSubject(),
        ];

        if ($attachments = $this->prepareAttachments($email)) {
            $payload['attachments'] = $attachments;
        }

        if ($replyTo = $email->getReplyTo()) {
            $payload['reply_to'] = current($this->prepareAddresses($replyTo));
        }