请教:Sendmail 下POP 与 Imap服务器的安装

安装Sendmail,需要安装Pop 与 Imap服务器,我在安装时rpm -ivh imap-4.7c2-12.i386.rpm
出现下面提示:
error: failed dependencies:
libcrypto.so.0 is needed by imap-4.7c2-12
libssl.so.0 is needed by imap-4.7c2-12
请问一下libcrypto.so.0及libssl.so.0在哪个包里有? Thanks for your solution