There are two A records for www.postfix.org, one of the web servers seems to be working fine, the other is returning 404s:
$ dig www.postfix.org A +short 168.100.10.85 131.211.32.146 $ telnet 168.100.10.85 80 Trying 168.100.10.85... Connected to 168.100.10.85. Escape character is '^]'. GET / HTTP/1.1 Host: www.postfix.org HTTP/1.1 200 OK ... $ telnet 131.211.32.146 80 Trying 131.211.32.146... Connected to 131.211.32.146. Escape character is '^]'. GET / HTTP/1.1 Host: www.postfix.org HTTP/1.1 404 Not Found ... Peter
