I am getting following error: Setting up ipopd (2002edebian1-11sarge1) ... WARNING: Port "pop2" unselected in debconf but possibly handled locally. Creating generic self-signed certificate: /etc/ssl/certs/ipop3d.pem (replace with hand-crafted or authorized one if needed). hostname: Unknown host dpkg: error processing ipopd (--configure): subprocess post-installation script returned error exit status 1 dpkg: dependency problems prevent configuration of ipopd-ssl: ipopd-ssl depends on ipopd (>= 4:2002.rc7debian); however: Package ipopd is not configured yet. dpkg: error processing ipopd-ssl (--configure): dependency problems - leaving unconfigured Errors were encountered while processing: ipopd ipopd-ssl E: Sub-process /usr/bin/dpkg returned an error code (1) What can cause this?