For now on, we will not allow PHP scripts to send emails as the user 'nobody' as is the default user for the Apache web server.
The reason for this is that other emails servers in general tend to see email sent as 'Nobody' as a source of spam and we have some customers with big member sites. In order to stay out of spam blacklists, we are change the way the web server handles emails generated via PHP scripts.
This means that you must make sure you configure your scripts if applicable to use your own site user account instead of the Apache user 'nobody'. Now on some scripts this may be a problem but you can also use SMTP over PHP which may scripts now support. Many scripts will work fine out of the box using the sites own user name as the sender. This also makes your site and our servers look better to other email servers.
What we have done is improved upon what we have in place already for security of your web site and our servers. Since we have SuPHP and Suexec running (along with mod_security + 1000's of custom security rules), we can enable the Apache Web Server and WHM/Cpanel not to allow the user 'nobody' to send email from web site scripts.
As most of you know, we have been battling Microsoft sites such as MSN and Hotmail from rejecting emails that come from our servers. We are looking at every angle to please their email systems. Please help us and yourselves by cooperating in this endeavor. - Jason Harcus