Setting up an alias username

[Kevin Smith]

Hi All,

I want have a domain which is owned by the user, lemon.

How do I set-up an alias of say, info, which is to be sent to the same
domain that, lemon, owns without setting-up a unix account?

Is it something to do with dropping a .qmail-info file into the qmail
directory of lemon?  If so, exactly what commands do I use to create this
alias file?

Many thanks,

Kevin