The zone relays.visi.com was home to the VISI.com Relay Stop List (RSL). According to the site, “RSL was created by volunteers, VISI.com users who wanted a conservative open relay list to use to assist VISI.com's "nospam" server filters. We are happy to share it with others in the Internet community.”
Hosted by VISI.com, a strong regional internet service provider with thousands of clients, it was positioned as a free alternative to the MAPS RSS relay blocking list. (The MAPS lists were originally free, but were converted to a “paid access only” system in 2001.)
In 2003, the RSL suffered from a hardware failure that resulted in a loss of data, but the system was restored by August.
The RSL website was last known to have been active in 2004. I have it on pretty good authority that since then, the people behind the project have moved on to other things.
The list is not active at this time. It will not block any spam, and I recommend against including it in any DNSBL checks, as it generates unnecessary DNS traffic to VISI.com.