==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release):
- Deployed with iRedMail Easy or the downloadable installer?
- Linux/BSD distribution name and version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Web server (Apache or Nginx):
- Manage mail accounts with iRedAdmin-Pro?
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

Hello , good morning.
If i need to  host only a mail acount not the entire domain in my host.
Can i configure a DNS MX  on Goddady  to point to my server?
some like

CNAME     mail                               myserver.com
MX          mail.newdomain.com         

and when i need to  sign the  Dkim   
(Add one line in @dkim_signature_options_bysender_maps)

I need to add   mail.newdomain.com ????

thx alot