I have Domino Notes version 7 and every now and then I get a message "Unable to connect to the SMTP server" and the email goes down. I try to see if I can't ping the DNS server and I can't and actually all connections are down, no server responds and internet is down on the Domino server. If I close the Domino then I get a reply from DNS server. As soon as I open the Domino again, everything goes down again. I have to restart the Domino server and then it runs normal again until next time it goes down. It seems to happen about every 7 - 10 days. I found Event ID 7034 and also Event ID 1000 in the Event Viewer and this is where it took me:
So far, I replaced the network card, I reinstalled Notes Domino, I change the port for this server, but the server still goes down.
What do you think the problem is and how can I fix it?