I installed this tutorial "Building A Virtual Server (VPS) With Debian 3.1 (Sarge) And OpenVZ" on a Athlon 1GHZ system with 385MB of ram. In total i have 5 VPS systems with Bind9 in the first VPS, Apache in the second VPS, and MySQL in the thirth VPS. Now i installed Postfix the way Falko explained in his "The Perfect Setup - Debian Sarge (3.1)" Howto into VPS number 4. I didn't install the total howto in one VPS ofcourse just only the postfix part. After installing i checked the /etc/postfix/main.cf and changed some parameters. When i save the main.cf WinSCP gives an error: *** Authenticatielogboek (bekijk het sessielogboek voor meer gegevens): Using username "root". Authenticating with public key "***************" Server sent disconnect message type 2 (SSH_DISCONNECT_PROTOCOL_ERROR): "Could not create socket pairs: Cannot allocate memory" *** It is partly in dutch but the most important lines are the last 3 wich are in english. I tried if google could find something about this error, just one site popped up with no solution. I really don't know where to look to fix this. I configured WinSCP to save a session.log i could paste it in here but that might be big. Maybe somebody already knows whats wrong from seeing the WinSCP error text?