Has anyone used Prospeo for list building? seems like it could be an easy high quality solution

Is the copywriting masterclass on John's channel still pretty much applicable today? In terms of formatting the copy and keeping the same approach of a longer email to remove objections.

I bought google domains, set up authentication (DKIM, DMARC, SPF), warmed them using instantly (15 emails per day) for 3+ weeks. I then ran my copy through spam checker to make sure no spam words are in there. Verified leads through Million Verifier Did an inbox placement test. All emails to Google landed in inbox. All emails to Microsoft landed in spam. Anyone else having the same issue?

@John Tanner Worthington @Ahmad Nouman would like to join this one, can you tell if you're still running this community?