How does anyone in IT who works with either email or DNS not know how reverse DNS lookups work? Even worse yet not know what a reverse DNS lookup even is. It boggles my mind when I have to explain ...

Reverse DNS is a site that displays reverse lookup results for approximately 4.3 billion IPv4 addresses in a map-like manner. This is what it looks like when you access the site. I can't tell what it ...

Here's our setup:<P>Internal DNS zone company.com. DNS servers are BIND 8.2 based. They are NOT run by my group. ds.company.com has been delegated to our group for our AD rollout. Currently all non-AD ...

Over the past few days, we have found that several ISPs put us on some type of block list that didn’t allow our mail through. … One told us that the only way it would allow the mail through would be ...

Yesterday we reported that MSNBot failed some reverse DNS tests. In short, if you did a reverse DNS lookup on the IP addresses of their spiders, it would not resolve to search.live.com. The big issue ...

Windows has an inbuilt command line tool – nslookup. It can be used to diagnose the Domain Name System (DNS) infrastructure. It needs TCP/IP installed on your computer to work. The only drawback here ...

A year ago, Microsoft promised to enable Webmasters a method of verifying MSNbot. Way too often, rogue spiders mask themselves as official spiders from Google, Yahoo, Live Search or Ask.com. The ...