If you offer HTTPS to your customers, you should not use weak encryption keys. This is a recommended setup:
SSLProtocol -ALL +SSLv3 +TLSv1 SSLCipherSuite ALL:!aNULL:!ADH:!eNULL:!LOW:!EXP:RC4+RSA:+HIGH:-MEDIUM
You can also test whether you server supports weak encryption or not:
# this command should fail openssl s_client -no_tls1 -no_ssl3 -connect www.your-server.tld:443
In case you want to check, what protocols and ciphers your webserver supports i suggest you to use SSLscan.