"customer.support@dhtmlx.com" not work

Hello,
I sent a technical question to your support email(customer.support@dhtmlx.com) recently, but unlike before, I didn’t receive the usual “[Request Received]” confirmation email, nor any response.
It seems that you did not receive my email? Could you please help me identify the problem?
I have a technical issue and currently cannot reach your support team.
Thank you.

Hello,

To help us investigate the issue, please send your question again using our contact form: DHTMLX Contact Center - Technical, Licensing and Purchase Support

In the request, please also mention that you are not receiving replies from our support team, so we can check it on our side.