Postfix

 Some hints according postfix and mySQL

Add Domain:

inside sql:

insert into domains (domain) values ('newdomain.tld');

Add User:

doveadm pw -s SHA512-CRYPT

inside sql:

insert into accounts (username, domain, password, quota, enabled, sendonly) values ('username', 'domain.d', 'String from Doveadm pw', 2048, true, false); 

Add Alias:

inside sql:

insert into aliases (source_username, source_domain, destination_username, destination_domain, enabled) values ('aliasname', 'domain.tdl', 'Target_User', 'domain.tld', true);

Refresh your dovecot with:

newaliases

List of AD User sort by when created

 In case you want to see your last created AD User

Run PowerShell as Admin

$DateCutOff = (Get-Date).AddDays(-30)

Get-ADUser -Filter * -Properties whenCreated | where {$_.whenCreated -gt $DateCufOff} | FT Name, whenCreated