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1. Create a system account whose mailbox will accumulate catch-all emails:

   Code Block
   useradd --no-create-home --comment "Postfix may re-route to this user mailbox" usercatchallmailcatchall

   (or skip this step and just use root  below)
   
   

2. Add a virtual_alias_maps parameter to your /etc/postfix/main.cf :

   Code Block
   # Map *@monitoring.redradishtech.com to jeff@redradishtech.com virtual_alias_maps = regexp:/etc/postfix/virtual_alias

   and postfix reload 

3. Create /etc/postfix/virtual_alias  containing:

   Code Block
   # Reroute all email, sending it to root's local mailbox #/.*@.*/ mailcatchall

   
   

4. Then make virtual_alias.db   (assuming you installed the Makefile shown earlier)

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