Force Default Mail Address for all accounts?

[Arun]

Is there any way to mass change the "Default Mail Address" for all domains (existing accounts) in the server to use ":fail: No such person at this address" with "Discard with error to sender (at SMTP time)"?

[vanessa]

Here's a sexy one-liner:

sed "s/^\*:.*/\*: :fail: No such person at this address/g" -i /etc/valiases/*

Back up your valiases folder first.

[Arun]

^^ Thank you!