--- /etc/init.d/cyrus-imapd     2013-11-27 08:29:58.000000000 +0600
+++ ./cyrus-imapd       2014-04-10 13:41:39.343774361 +0600
@@ -45,12 +45,15 @@
 start() {
     is_yes "$NETWORKING" || return 0
 
+   if [ ! -f /var/lib/imap/ssl/cyrus.cert -o ! -f /var/lib/imap/ssl/cyrus.key ]
+   then
     ssl_generate "cyrus"
     cp -f "$SSL_CERTDIR"/cyrus.cert /var/lib/imap/ssl/
     cp -f "$SSL_KEYDIR"/cyrus.key /var/lib/imap/ssl/
     chmod 0640 /var/lib/imap/ssl/cyrus.{cert,key}
     chown root:cyrus /var/lib/imap/ssl/cyrus.{cert,key}
     find -L "$SSL_CERTDIR" -type l -delete
+   fi
 
     start_daemon --pidfile "$PIDFILE" --lockfile "$LOCKFILE" --expect-user cyrus -- \
     cyrus-master "$CYRUSOPTIONS"