Noptin_Mailer::get_headers()

	public function get_headers() {

		$name       = $this->get_from_name();
		$reply_to   = $this->get_reply_to();
		$content    = $this->get_content_type();
		$headers    = array( "Reply-To:$name <$reply_to>" );
		$headers[]  = "Content-Type:$content";

		if ( ! empty( $this->mailer_data['merge_tags']['unsubscribe_url'] ) ) {
			$url       = esc_url( $this->mailer_data['merge_tags']['unsubscribe_url'] );
			$headers[] = "List-Unsubscribe:<$url>";
		}

		$headers = implode( "\r\n", $headers );
		return apply_filters( 'noptin_mailer_email_headers',  $headers, $this );

	}