-----Original Message----- From: John S Russell [mailto:jsr(a)jsr.com] Sent: Monday, 3 September 2007 11:09 a.m. To: Hamish MacEwan Cc: nznog(a)list.waikato.ac.nz Subject: Re: [nznog] Continued problems with xtra email
[...]
But the other MX on (B) is still reachable from (C) despite any or all of these possible reasons because it's on a completely different network and probably (if Joe's being sensible - and he always is[1]) one that's been chosen specifcally to be as diverse as possible from (A).
This is a pretty common setup for services like MX's, DNS servers, and other stuff that you'd like to have reachable more often than not, where support for multiple servers is built into the protocol itself.
JSR
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