-{{When a message to the current domain doesn't match any other alias, and it
- doesn't match any systemwide username, send it to this e-mail address.}}
-val catchAllAlias = \email -> aliasPrim catchAllSource (addressTarget email);
-{{When a message to the current domain doesn't match any other alias, send it
- to this e-mail address, even if it matches a systemwide username.}}