vps832469560:/etc/postfix# dpkg --get-selections| egrep "ssl|tls"
courier-imap-ssl                                install
courier-pop-ssl                                 install
courier-ssl                                     install
libcupsys2-gnutls10                             install
libgnutls11                                     install
libnet-ssleay-perl                              install
libssl-dev                                      install
libssl0.9.7                                     install
openssl                                         install
postfix-tls                                     install
ssl-cert                                        install