I've got bad rating of my sent e-mails because of my invalid Helo. I have no idea how to fix it.
CentOS 7
On Kimsufi
Any ideas?
Ok, I've done something and it helps. I've made change here /etc/hostname with my new hostname: development.mydomain.com and added next A records with this domain pointing to my serv. IP . I've changed server hostname in Plesk settings as well and after this last step my e-mail got correct 'Helo'.
But I didn't change anything in my Kimsufi panel and he still showing my old hostname... . Thank you :)