Allow rejection of incoming mail with a specific local-part in a catch-all domain
I love using a catch-all domain, for the possibility of giving out a different address to different entities without having to add an alias or do anything else - like i can give <acme@mydomain> to a company named acme i purchase stuff from.
But: if an entity becomes annoying, it would be nice to be able to shut down a specific address within my catch-all domain. In other words, if <acme@mydomain> starts to receiving mail from acme that i do not want to see any more and unsubscribe does not work, or if that address leaked out to spammers, it would be extremely nice to be able to configure the system so that mail to this address gets a "550 User unknown" at the SMTP level because that address is in a deny table which is consulted by the MTA before the normal lookups used to look-up the destination mailbox for the catch-all mydomain.
This is, I think, the only feature in mailbox.org that I miss.
I like this idea 
I am also an intensive user of the catch-all function. I love catch-all because it gives me a lot of freedom in how I organize my emails. But unfortunately, this comes at the price of receiving a lot of SPAM.
The suggestion would be an extremely helpful feature and would certainly reduce spam in exactly the right way. I am also sure that it would make mailbox.org stand out very positively from other providers. I don't know of any provider where this is possible. Only as a filter rule, but not at the SMTP protocol level.
I am also an intensive user of the catch-all function. I love catch-all because it gives me a lot of freedom in how I organize my emails. But unfortunately, this comes at the price of receiving a lot of SPAM.
The suggestion would be an extremely helpful feature and would certainly reduce spam in exactly the right way. I am also sure that it would make mailbox.org stand out very positively from other providers. I don't know of any provider where this is possible. Only as a filter rule, but not at the SMTP protocol level.
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