2010/6/11 Niki Kovacs contact@kikinovak.net:
Now the curious problem I have: IP addresses are attributed correctly, people can surf on the internet all right. But the only thing they can't seem to do is send mail with Outlook or Outlook Express. I have to revert to the ISP's DNS, but so I lose the benefit of local DNS. And I don't have the slightest clue as to why that is so.
Perhaps, they cannot resolve the IP address of their outgoing SMTP server?