I'm a Linux newbie, and am running an FTP-install version of SuSE 9.1. Everything is running quite well, and I have a website up at the following location:
publichealthcenter. com
On the site, I have some phpBB forums and a wordpress install running, working fine.

When folks register, the forums are automatically sending them an email with their registration information -- this is ALSO fine.

However, what isn't fine is that I have no clue how to change the settings for the default mail server that is obviously running on the machine.

When somebody leaves a comment on my Wordpress site:( publichealthcenter.com /blogs/clay/), it automatically emails me a message, but the message is from
some-string @ linux.site and/or
wordpress@ publichealthcenter. com

Yikes! These aren't valid. How can I set this up so that I never show @linux.site, but instead, have something like admin @ publichealthcenter.com?

Where are the settings for the mail server, and how to I change them to make them valid? (Note: even nudges in the right direction would be helpful here.)

Thanks!

p.s. It won't let my post URLs because I don't have 5 posts yet.