TDengine supported me and promised me a license for PHP extension

Hello Christoph, I replied the email and always return failed. [Remote Server returned '550 5.7.350 Remote server returned message detected as spam -> 550 5.7.1 Looks like spam to me.'] So I write a new mail. As mentioned, I need one explicit permission of TDengine, https://news-web.php.net/php.pecl.dev/17462. I have communicated with TDengine, TDengine agreed with my development of extension and expressed explicit support, and promised to give me a license to allow me to use of library files to develop TDengine's PHP extensions. Is there a template for the license, or no fixed format? Thanks.