Whitelist domain or address for an alias and block all other domains or addresses

[gogogohub]

I would like to whitelist a domain or address for a particular alias and block all other domains or addresses from sending mail to a particular alias.

Thanks so much!.

[IpsmLorem]

Yes and why not an option to whitelist only the first domain ou adress sending an email too ?
Each alias would also need a better block/allow sender management gui.

[shinjipons]

When I create an alias linked to a domain, I would like to only receive emails from that domain.