==== Required information ====
- iRedMail version (check /etc/iredmail-release): 0.8.7
- Linux/BSD distribution name and version: CentOS 6
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQl
- Web server (Apache or Nginx): Apache
- Manage mail accounts with iRedAdmin-Pro? iRedAdmin ProSQL v1.8.2
- Related log if you're reporting an issue:
====

I want to change mail server:  old ip address to new ip address.
Do iRedMail server have error?

Thanks for your help,