I'm using this service from dyndns since I have problem setting up Mercury.
Also I'm using cslh livehelp.
To send email, I have to amend the php.ini. I got the host right but I have also to login and authenticate. I've use auth_username=username and auth_password=mypassword but my service at dyndns does not recognise it and I get error message stating that. Hope someone can help me. I will really appreciate that.