Using 'Block messages from:'

[myriad]

Can I block ALL mail to a specific account with the 'Block messages from:' option in the preferences? I have an account that feeds an rss feed aggregator and I don't want anyone except for one specific address sending mail to this account. Is it possible?

[uxbod]

The black/whitelists is ZCS V6+ are by user/domain ... I believe if you want to allow just one account to send to it then you would need to implement it at the postfix level using :- Wiki :: Improving Anti-Spam system (Blacklist)