Mail to Unknown User

I thought I had read somewhere that if mail is sent to an unknown user
unknown@xxxxxxxxxx , you can set a catch all mailbox.
1) Is this Doable ?
2) Do I want mail sent to anyname at my domain to received or do I want it
rejected.?

I can see the point if a sender misspells a address, but what is the down
side

Regards

Mark Gibbons


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