Postfix configuration problem

[Self-Defence]

Ok here's the thing I finly decided on Postfix for my MTA. So I set tryed to set it up via Webmin using this howto guide. Postfix is working and I can recive and send email via it, but I'm still not clear on a cuple of things. Curently as I understand it is working like this my user name is lets say "joe" and my domain si "something.com". So I enterd the domain into /etc/postfix/virtual like this:
something.com localhost.localdomain.local
and added this to /etc/aliases
joe: joe@something.com
and everything works ok any email sent to joe@something.com gets to my mail box.
But I would like to have more than one domain set up. So I added the second domain "somethingelse.com" into /etc/postfix/virtual
something.com localhost.localdomain.local
somethingelse.com localhost.localdomain.local
and added /etc/aliases
joe: joe@something.com, joe@somethingelse.com
This also works.
But I can't seem to get info@something.com to be deliverd to user joe or joe.surname@something.com to get deliverd to user joe. And I would like to set up something lik this support@somethingelse.com to a user called jane.
so I tryed to add these to the /etc/aliases
joe: joe@something.com, joe@somethingelse.com, info@something.com
jane: support@somethingelse.com
But it doesn't work. I'm not sure what I'm doing wrong or if I understand everything. So if someone would be so good to give me some pointers on how I sould set Postfix up, so that I could use more domains, and any email(domethin@somedomain.com to user someone) to any user.
I tryed via Webmin and via SSH to configure things.

Thanks for the help..

[Allblack]

Hey,

I am new to postfix myself and I don't use webmin.
I am not completly sure that I understand the problem either.
There is no need to edit /etc/aliases.

STEP 1
Add the following to your main.cf file
virtual_alias_domains = something.com, somethingelse.com
virtual_alias_maps = hash:/etc/postfix/virtual

Dont forget to do a postfix reload

STEP 2
In your virtual file add something like this

joe@something.com joe
joe@somethingelse.com joe
support@somethingelse.com jane

if you want a catch-all address add something like

@something.com joe

Don't forget to do a postmap virtual

It might help to post your main.cf file (edited version as it is long by default) and some of your mail log

Like I said, I am new to postfix but I replicated what you seem to be after

[Self-Defence]

I actualy figured it out late last night. The exact procedure as you described but the diference I made was to the virtual file. I added
info@something.com joe@something.com
joe.surname@something.com joe@something.com
support@something.com jane@somethingelse.com
and it also works. So I think I've got the basic idea now.

Thank you for your help.