We have a Linux server with a single site set up on it (site1.com), down the road we may set up additional sites.
When we send an email through php it comes from www-data@site1.com
We would like to change it to contactus@site1.com, but also make it so that when we add site2.com down the road, we can have the default email set to admin@site2.com for instance.
I tried setting it in .htaccess, but that didn't seem to work. maybe I did it wrong.
php_value force_sender contactus@site1.com
Linux noob, so what's the best way to do this?