When I first joined zoho I thought I could add alias emails so that I could separate emails coming form website registrations from one from friends etc.

I've read the help guide and it said to log onto the admin section which I've done but I still can't add an alias.

I've also read somewhere else that I have to have a domain now to be able to add an alias email.  I have not idea how to get a domain.  

What can I do please?

Thanks

Fiona