Catching all emails for a domain with Postfix(Catch all Emails)

We have to add a wildcard entry in /etc/postfix/virtual or any virtual mapping files.For simplicity we use /etc/postfix/virtual  file and append this:

@example.com  admin

And we have to do this to map that:

postmap /etc/postfix/virtual

And add this line if it does’t exist in /etc/postfix/main.cf:

virtual_alias_maps = hash:/etc/postfix/virtual

Finally,

/etc/init.d/postfix restart

This way every email sent to anything@example.com will be redirected to admin@example.com