Tony Finch wrote: > Make sure you have the line > mdns off > in /etc/host.conf on your incoming SMTP servers.
IIRC, /etc/host.conf is for libc5. libc6 uses /etc/nsswitch.conf > One of my colleagues in our network engineering team discovered today that > ppswitch was spewing multicast packets, much to our surprise. It turns out > that recent versions of glibc have quietly added support for multicast DNS > to the resolver. Multicast DNS is part of Apple's zeroconf networking > system (aka Bonjour, previously known as Rendezvous), and it takes over > responsibility for host names ending in .local. See it in action by typing > strace ping foo.local and observe it sending a DNS query to the class D > multicast address 224.0.0.251. # ping x.local ping: unknown host x.local # TCPdump: 00:14:36.580336 IP 192.168.2.7.32796 > 198.32.64.12.53: 47461% [1au] A? x.local. (36) 00:14:36.704271 IP 198.32.64.12.53 > 192.168.2.7.32796: 47461 NXDomain*- 0/1/1 (111) libc6 v2.6-3 (debian) Maybe it doesn't happen with debian's libc6? -- Lab tests show that use of micro$oft causes cancer in lab animals Got Gas??? -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/