setting up mail server

[Ken Weingold <s14b23@mindspring.com>]

I am trying to be able to allow mutt to send and receive mail from my 
2.2r2 system here with DSL.  I decided to install exim since it seems to 
be easier to configure than sendmail.  It seems to be working sending to 
yahoo.com (surprise), but when I tested to a mindspring.com address, it 
bounced with:

550 Dialups/open relays blocked. Contact <openrelay@abuse.earthlink.net>


Anyone know how I can make it work with all addresses?

Thanks.


-Ken