Users's "Lost Password" feature

==== Required information ====
- iRedMail version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Linux/BSD distribution name and version:
- Related log if you're reporting an issue:
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Greetings,
I require a "I lost my password" feature on my iredmail (I"m using OpenLDAP version).
How do I set that for my users to recover their passwords?

Thank you.