==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): 0.9.9
- Deployed with iRedMail Easy or the downloadable installer? downloadable installer
- Linux/BSD distribution name and version: Ubuntu 18.04.2
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):  MariaDB
- 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 there,

I have a server running on ubuntu 18.04.2 with about 6 domains, about a total of 10 email accounts all up.

When setting up i followed these instructions: https://www.linuxbabe.com/mail-server/s … ains-nginx - so i have one main cert and then a few subordinate certs for each domain.

When i set this up it was a bit of an experiment but things have gone really well so i want to give the server a good resource bump to improve performance.  I feel that doing this on freebsd will allow it to make the most of this extra resource.

Is there anything i need to look out for when shifting from linux to unix in terms of the migration instructions here -- https://docs.iredmail.org/migrate.to.ne … erver.html ?

Can i copy over the SSL certificates to the new server or do i need to get new ones?

I have customised postfix config a bit to use an upstream smtp relay for delivery, changes to allow more permissive delivery of emails etc to suit some requirements, can i copy and paste the config to the new server?

Will clients notice any disruption after the cutover and the new server answering their requests?

Thanks very much!