Hi, I have a mailcow that works but get denied by google couse of rDNS, my ISP is charging me almos 100$ more just to configure that, so i was messing arround and did found the actual rDNS that is registered for my ip, can i make an mail server with that hostname and put on the Extra name server for webui the mail.domaim.com to access it, will it work?
And can i change on the actual VM or is better do it all from scratch?