I have the same problem with my CF7 (v5.1.1) emails “being treated as spam” (orange box) and have been doing a host of things as recommended in all the various forums and sites to try to resolve the issue with no success. I have replaced reCaptcha with HoneyPot. I have tested my site’s ability to send emails through Post SMTP and all tests are sent and received with no issues. I’m not sure what to try next. Any further insight would be greatly appreciated. Thank you in advance.