Forum email notifications are considered spam by Google


I am subscribed to a few topics on this platform and regularly receive email notifications in my gmail account. Unfortunately, gmail considers them as spam.
Anyone else experiencing this behavior?

Here is what Google gives me as an explanation why the message is classified as spam:
[i] It is in violation of Google’s recommended email sender guidelines:
Authentication & Identification

To ensure that Gmail can identify you:

Use a consistent IP address to send bulk mail.
Keep valid reverse DNS records for the IP address(es) from which you send mail, pointing to your domain.
Use the same address in the 'From:' header on every bulk mail you send.

We also recommend the following:

Sign messages with DKIM. We do not authenticate messages signed with keys using fewer than 1024 bits.
Publish an SPF record.
Publish a DMARC policy.

more here[/i]

How to contact the developers of this forum software or file a bug?