[cobalt-users] Settings for email relaying

[Peter Low <peterlow@xxxxxxxxxxxxxxxxxx>]

I have one remote user that needs to be able to send and receive email 
through our server.  He will be travelling occasionally.  Currently, he is 
able to receive email through the server, but cannot send -- he gets a 
relay error.  He is using Earthlink as his ISP.  I understand that I can 
set up the server to relay mail from Earthlink.net, but would prefer not to 
open things up quite so much.  Is there a way to enable relaying for this 
one person?  My worry is that at some point we'll hire someone who will 
want access through spamnet.com or some such.

Am I justified in not wanting to open relaying to a big ISP?

Another thing, the documents I found at Cobalt mention asking for a limited 
set of IP addresses to enable (rather than enabling an entire domain).  Who 
do I contact for these addresses?

Peter