addressesFormData example

        return $this->host.($this->port ? ':'.$this->port : '');
    }

    private function formDataPart(Email $email, Envelope $envelope): FormDataPart
    {
        $fields = [
            'from' => $envelope->getSender()->toString(),
            'subject' => $email->getSubject(),
        ];

        $this->addressesFormData($fields, 'to', $this->getRecipients($email, $envelope));

        if ($email->getCc()) {
            $this->addressesFormData($fields, 'cc', $email->getCc());
        }

        if ($email->getBcc()) {
            $this->addressesFormData($fields, 'bcc', $email->getBcc());
        }

        if ($email->getReplyTo()) {
            $this->addressesFormData($fields, 'replyto', $email->getReplyTo());
        }