Why do all my emails end up in SPAM?

Question

Apache HTTP Server

Set up VPS with ISPmanager. I'm trying to send a test email, but it doesn't work. The letter does not arrive. I tried to check the letter using the service https://www.mail-tester.com/ so it shows the result 0/10 and says that the letters are not liked by SpamAssassin. Namely, the parameters:
HELO_DYNAMIC_IPADDR2
SUBJ_ILLEGAL_CHARS
I searched the Internet, but unfortunately I did not find a suitable solution. In which direction to dig?

Answer 1

HELO_DYNAMIC_IPADDR2 - The sender's IP address is in the dynamic address range.
SUBJ_ILLEGAL_CHARS - The Subject header contains characters outside the range of the standard ASCII set [0-127].
Incorrect SPF setting for mail domain name or attempt to send under someone else's address.
The solution is to use a properly configured SMTP server and send through it. You can use the SMTP server of Google, Yandex, Mayra, etc., if you have an account there.

Answer 2

https://mxtoolbox.com/emailhealth
what does it say here can I have a screen?