Mail is not sent. Checking ip address against antivirus databases?

Question

Email

There is a purchased vps. And there is sending mail from it. Was in the spam database when buying. We were pulled out of all the bases, but ... It turned out that we were sitting somewhere else. And two government offices stubbornly refuse to accept mail from us. There is no response to an attempt to connect via telnet. During manual tests, it turned out that one of us was blocking the trend micro antivirus in the mail ... Suspicions began to appear that in some other non-public firewall-type databases. And here's how to check all these antivirus databases? Checkpoint? Fortigate? and similar
Administrators of that side wrote, only one answered, and that was not the topic.
According to https://mxtoolbox.com/ everything is clean, we are only in old records www.sorbs.net