phplist return-path

Found that phplist was having some bounces of unknown user. These were bounces which were going to the local sender email id - found that Sai Spiritual phplist emails had return-path showing this as the return-path (which was not being resolved by google apps, of course). Googled and found
http://docs.phplist.com/PhpListConfigBounces
Un-commented in the /config/config.php
$message_envelope = "noreply@sssbpt.org";
and made the return-path noreply@sssbpt.org

Also noted that on the new Ubuntu install, vi filename uses the old-style vi - for the more user-friendly version where you can use the arrow keys, have to use vim filename !