Postfix virtual_alias_domains and Maildir

[Keith Smith]

Sorry,

More questions.

I am looking at the Postfix docs  
http://www.postfix.org/VIRTUAL_README.html#local  and there is one short 
page of info on how to configure Postfix for a website hosting machine.

In the main.cf file it says I should add two lines:

  virtual_alias_domains = example.com ...other hosted domains...
  virtual_alias_maps = hash:/etc/postfix/virtual

Can I make virtual_alias_domains use a hash table like this:

   virtual_alias_domains = hash:/etc/postfix/domains


I have configured Postfix to use Maildir.  Do I need to manually add the 
Maildir directory for every user?   Will that be right off the root of 
the user directory like /home/some-user/maildir ?  What permissions and 
who is the owner?


Thank you so much!!

Keith