when I got the aptitude install postfix postfix-mysql postfix-doc mysql-client mysql-server courier-authdaemon courier-authlib-mysql courier-pop courier-pop-ssl courier-imap courier-imap-ssl libsasl2-2 libsasl2-modules libsasl2-modules-sql sasl2-bin libpam-mysql openssl getmail4 rkhunter binutils maildrop You will be asked the following questions: New password for the MySQL "root" user: <-- yourrootsqlpassword Repeat password for the MySQL "root" user: <-- yourrootsqlpassword Create directories for web-based administration? <-- No General type of mail configuration: <-- Internet Site System mail name: <-- server1.example.com SSL certificate required <-- Ok on page 4 I didn't get any questions at all and this is the difference I got after doing it a day or 2 ago successfully The following actions will resolve these dependencies: root@ubuntu:~# aptitude install postfix postfix-mysql postfix-doc mysql-client mysql-server courier-authdaemon courier-authlib-mysql courier-pop courier-pop-ssl courier-imap courier-imap-ssl libsasl2-2 libsasl2-modules libsasl2-modules-sql sasl2-bin libpam-mysql openssl getmail4 rkhunter binutils maildrop Reading package lists... Done Building dependency tree Reading state information... Done Reading extended state information Initializing package states... Done No candidate version found for postfix No candidate version found for postfix-mysql Couldn't find any package whose name or description matched "postfix-doc" No candidate version found for libsasl2-modules-sql No candidate version found for sasl2-bin No candidate version found for binutils No candidate version found for postfix No candidate version found for postfix-mysql Couldn't find any package whose name or description matched "postfix-doc" No candidate version found for libsasl2-modules-sql No candidate version found for sasl2-bin No candidate version found for binutils The following packages are BROKEN: citadel-mta courier-authlib mysql-client-5.1 mysql-server-5.1 rkhunter The following NEW packages will be installed: citadel-common{a} courier-authdaemon courier-authlib-mysql courier-authlib-userdb{a} courier-base{a} courier-imap courier-imap-ssl courier-pop{a} courier-pop-ssl courier-ssl{a} expect-tcl8.3{a} libfam0{a} maildrop mysql-client mysql-client-core-5.1{a} mysql-server mysql-server-core-5.1{a} tcl8.3{a} unhide{a} 0 packages upgraded, 24 newly installed, 0 to remove and 0 not upgraded. Need to get 24.0MB of archives. After unpacking 58.4MB will be used. The following packages have unmet dependencies: mysql-server-5.1: Depends: libdbi-perl which is a virtual package. citadel-mta: Depends: citadel-server (>= 7.50) but it is not installable mysql-client-5.1: Depends: libdbi-perl which is a virtual package. Depends: libdbd-mysql-perl (>= 1.2202) which is a virtual package. courier-authlib: Depends: libltdl7 (>= 2.2.6a) which is a virtual package. rkhunter: Depends: binutils which is a virtual package. The following actions will resolve these dependencies: Keep the following packages at their current version: citadel-mta [Not Installed] courier-authdaemon [Not Installed] courier-authlib [Not Installed] courier-authlib-mysql [Not Installed] courier-authlib-userdb [Not Installed] courier-base [Not Installed] courier-imap [Not Installed] courier-imap-ssl [Not Installed] courier-pop [Not Installed] courier-pop-ssl [Not Installed] courier-ssl [Not Installed] maildrop [Not Installed] mysql-client [Not Installed] mysql-client-5.1 [Not Installed] mysql-server [Not Installed] mysql-server-5.1 [Not Installed] rkhunter [Not Installed] Score is -99249 Accept this solution? [Y/n/q/?] how do I fix this ?