Config
   cfs - configset sect.opt val
   cfg - configget sect.opt

   ds - domainservices: smtp pop imap sieve???

- Aliases
    - avoid looping aliases

- Domain
    - optional limits for number of:
        + accounts
        + aliases
        + destinations/alias
        + alias domains

Database:
   public.users.passwd: increase to "character varying(150)"
   	why? `doveadm pw -s SSHA512.hex -p 1`
   public.users.digestmd5: add "character varying(48)"
	Outlook will love it. (`doveadm pw -s DIGEST-MD5.hex -p 1 -u 0`)