How do I set up a catch-all email address to receive or bounce invalid inbound emails?

  1. Virtualmin
  2. Choose the domain name of your server from the pull-down menu
  3. Click "Edit Mail Aliases"
  4. Click "Add an alias to this domain"
  5. Set "Name" to "All mailboxes"
  6. Fill in the delivery settings as usual (a local mailbox, usually).
  7. Click "Bounce mail?" if you want to use this catch-all email account to bounce inbound emails with invalid email addresses.

To "turn off" the automatic email bouncing, simply delete this catch-all email alias.