does any body know configuring domain authentication..?

does any body know configuring domain authentication..?

This is required by domain to send email to MSN and AOL.
This is somthing which authanticates your domain to use the IP's of your host.

HELP..?

 

Just look for SIDF (by Microsoft) and DKIM (Yahoo) homepages. You should be able to get all the information you need there

 

You can try using the PHPMailer class.
http://phpmailer.sourceforge.net/

They are usually able to set the correct headers required to avoid being marked as spam. It worked for me in GMail .

As for the domains, I think they are usually set when you set your domain name's name server as those of your webhost. There are things called MX records in the name server that determine which server handles the domain for a particular domain. That may be it.MX Records are used only when a mail is to be recieved by that domains. But they may also be used to check the authenticity of an email.

You can contact your host about this. There is usually a 'Mail' option in CPanel, which is used to set up the mail accounts. This usually sets the MX Records to the right values.

Thomas