I thought it was just a lack of skill on my part in finding/making the correct configuration.
I am curious about your results, so keep posting! :)
But what do large email servers that use Dovecot do?
I thought it was an orchestration between OpenLDAP, Postfix and Dovecot because theoretically LDAP is the best place to store users, groups, passwords and permissions.
I agree, however I am currently configuring ldap users on the os, and have dovecot use the os. I think it is also a little more secure having the os manage users. I once tested dovecot in a container with direct ldap access but can't remember much from it. Does dovecot take settings from ldap.conf so you can have redundant ldap servers configured?
b) with the query below in [ /etc/postfix/ldap-senders.cf ] users with permission to access shared mailboxes can send mail using the shared mailbox address; however, the mail is in the Sent folder of the user who sent it and not in the Sent folder of the shared mailbox (where I would like it to be); The idea is that if three people have access to a shared mailbox, the first one to read and respond to an email will leave it saved in the Sent folder of the shared mailbox so that the other two can see that the email has already been responded to
Maybe global sieve rule that check this? Afaik you can enable in outlook that send messages should go to the active folder if you are not on the inbox, but it does not work on all folders. I can remember thinking about having a module made that would do this automatically.