Windows NT - Running some sort of mail server, 550 not permitted
Posted on 2005-04-09
We had to swap the internet from a BT ADSL feed, to One Tel today.
Their was a main Windows NT Server that everything seemed to be recieving IP addresses from, linked to a router I could not get any details for.
The Server IP before the change was 10.0.0.1, and had a gateway of 10.0.0.253.
We purchased a new router and set all machines including the server to obtain IP automatically.
All machines can pick up IP address - but know we are unable to send external email from any of the machines.
We noticed that on the client machines outlook was set to connect to 10.0.0.1, with the auto config the server IP had changed to 10.0.0.4 - we updated all clients so now outlook opens. The problem is that we are unable to send external emails or recieve any external mails.
The server now has an IP of 10.0.0.4 , with a gateway of 10.0.0.2 (The new router we have installed)
When we send an email - it comes back to the inbox, within the message it states
"550 Relay not permitted"
Any ideas on what it could be