You need to check more than than blacklist check. Here are the things i would start to begin with.
1. SPF 2. DKIM records 3. DMARC records 4. IP Warmup 5. Check the scores at mail-tester.com. 6. Domain reputation 7. Reverse DNS records 8. Opt ins. Regards Ahsan On Mon, Oct 12, 2020 at 11:37 PM Jason Long <hack3r...@yahoo.com> wrote: > Hello, > Why I sending email from my server to Yahoo! Or Gmail, then it sent to > Spam and not Inbox folder? I checked my server IP by " > https://mxtoolbox.com/blacklists.aspx" and everything is OK. > > Thank you. >