can you clarify two doubts? I’m struggling to set up the system.
1 - The DNS PTR before a few days ago was mandatory on this page, now it appears as ² (optional). Why that? Isn’t reverse DNS required to send emails to forums?
2 - what could be causing the problem in DNS TLSA 110: Operation timeout? This type of DNS does not exist at my provider (only CNAME, A, YYYY, etc.)