==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): 1.6.1
- Deployed with iRedMail Easy or the downloadable installer? downloadable installer
- Linux/BSD distribution name and version: "Ubuntu 20.04.3 LTS
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): PGSQL
- 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 all,
Im running my iRedMail server with postgres backend and now i want to change my users authentication.
My need is to keep my users mail addresses on local iRedmail server and use an external auth server such as ldap to store all passwords and only auth will be there, so my first question is it possible to do it with my actual backend ? and how can i relate my iRedMail to that server.

I apperciate any help you can provide