Thanks dear factor I track the both tutorials, yours one, and other one from Zeiter,Just answer some of your questions: Not to much of a big deal.
Standard Dovecot doesnt do this the user or someone must login.
I would stop focusing on cpanel. Directadmin, Interworx, Plesk... arent Cpanel.
Dont do this use the file in my guide.
You dont have to yell... We all have been there. We all have the things we dont like in DA or any other panel. It is not a bug Dovecot works this way in the Standard format. Is Cpanel doing something to get those folders on account creation maybe so.
Code:mailbox "Sent Messages" { special_use = \Sent auto = no }
I dont have this one in my Guide if you need it just add it to the 90-special-folders.conf file.
https://forum.directadmin.com/threads/imap-folders.54713/
but now checking few times on outlook its working well!, seems all ok now
Maybe this thing with setting 0 to da settings for inbox.spam to junk + other things make the things good. I dont know... Seems all ok for now...
And yes will include this AUTODISCOVER because I see it cannot to autodiscover on thunderbird now at all, I have only imap port enabled all pop ports blocked, (because pop in past did many troubles to me because 99% clients using imap, and when they switched to pop after changing the devices, it did big mess, because many of clients have like 30 GB of email in storage synchronized in imap for last 5 years and imagine what kind of problems that caused abuse of server, deleting emails from inbox) etc etc, many problems, so pop is blocked on each of my client and using only imap, also doing backup regulary to backup servers for all things...
P.S. with directadmin @DirectAdmin Sales , @DirectAdmin Support , I like most the things like 99 % of them, I am not switching 20 servers from CP to DA without a reason .
THANKS to all !