==== Required information ====
- iRedMail version (check /etc/iredmail-release): 0.9.6
- Linux/BSD distribution name and version: ubuntu 16.04
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): mysql
- Web server (Apache or Nginx): nginx
- Manage mail accounts with iRedAdmin-Pro? no
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

Hi,
first of all registering here is not quite simple, because the helo from the registration mail is a non existent subdomain (iredmail blocks that): gproxy7.mail.unifiedlayer.com

But my main problem is, that the helo of my sent mails is localhost.localdomain, and I dont know why.
When I change my /etc/hosts file its resetting after a reboot to localhost.localdomain local mail mail.mydomain.tld

nevermind seems like ubuntu does this, not iredmail