DNS setting in Cloudflare for working smpt server


i tried to setup smpt server on my domain. Since I use cloudflare it does not work anymore. I checked the mail.log and it shows bad ptr record. Before i did not have this issue. Does anybody know how the correct ptr record or mx, ptr, a, cname records should look like to setup a working smpt server?

:grey: it.

Troubleshooting Email Delivery Issues when using Cloudflare