Prevent receiving emails by account name

[ZZZ]

I have an account called username@domain.com. This account receives huge number of spam messages. I would like to prevent receiving emails by this account name, and use aliases instead.

Please note that changing the account name is not possible. I'm running Zimbra 5.0.2.

[Dirk]

Other than adjusting the spam filter rules to drop more of the spam, I cant see any way to make this work.

It's possible that you could do something at the postfix level, but I could see problems with it as postfix would get itself into a loop. ie:

Drop all mail delivered to "realaccount@domain. com"
Send all mail delivered to "alias@domain. com" to "realaccount@domain. com"

which clearly wont work.

Hopefully someone can prove me wrong