Question Which Blackholelist(s) do I choose?

[casperb71]

In Plesk I have only zen.spamhaus.org as blackholelsit configured.
This moment there is a many spam mails so I think I have to enlarge the range of the blacklist.
Which list do you recommend?
(sorry for my English)

 

[MarkM]

I'd recommend adding Barracuda.

 

[casperb71]

Thanks Mark for your support. For using Baracuda I have to register and give the IP-adress of my server. Is that correct?