SecuritySage header_check, mime_header_check, and access files

[Ryan Turnbull]

Hello,
   I'm just rebuilding one of our old servers here and I see that the 
previous administrator was using the header_check, mime_header_check, 
and access regex files from SecuritySage.  I tried to go the security 
sage site and it appears to be down, and most posts I have seen out 
there support that assumption.  Anyways, my question for Postfix users 
is, is there another site/company that is providing those files 
updated?  Should I be abandoning this old method for RBLDNS?  If there 
are any suggestions or sites to point me in the right direction for 
lists of valid RBLs or someone/company that is producing those regex 
check files, it would be appreciated.

Thanks

Ryan