Typically, I need as least 4 email accounts (3 for work (different domains) and 1 personal). I have achieved this on my current setup by using virtual domains via apache and postfix -> pointing the virtual domain's email to my real account on the server.

How can send email from my virtual domains using Zimbra? E.g. In Horde/imp I receive all mail to one account, and I can configure numerous 'personalities' to send from. Can I do this in Zimbra?