Found a lot on google about bar888 spyware
One link looks like it may help
http://www.anti-spyware-101.com/remove-toolbar888/
I would make a backup of your registry first.
Start > Run
type REGEDIT and click OK
File > Export
navagate to a folder to save in or create one
save ( I use the date 20070120 as a file name)
Yes if you own a domain name spammers will try to send to any name at your domain.
Set the default address to :fail: and 99% of the spam is gone.
I only use my ISP address for the contact address
and this forum and have never received any spam at that address.
It will only take you a few minutes to open Fantastico in your cpanel
and scroll down tp phplist and install with a few questions like folder name, user, password.
Might be worth taking a look.