To generate hash values on files, you can use a convenient freeware hex editor tool called HxD. In HxD, navigate to “File” then “Open” and select the SeedSigner .zip file Navigate to “Analysis” then ...
It contains IP addresses of spam senders and hash values (fuzzy checksums) of incoming spam. The blacklist can be used to protect mailservers against spam. But checking a single DNSBL should not ...
If you want more from the Finder, check out FileUtils. It offers options for immediate and secure deletion of files, support for more compression formats, more powerful batch renaming, file checksums, ...