Steve Dobson wrote: > Tony > > On Fri, 2008-02-15 at 15:47 +0000, Tony Finch wrote: >> We use round robin DNS and it works fine, so long as nothing breaks :-) >> Most MUAs will not try more than one IP address, so if the IP address they >> have fixed on stops working they will break too. The way we deal with this >> is to just shift the IP addresses of the broken machine onto a hot spare. >> (We haven't automated it because our machines are too reliable to make it >> worth adding complexity.) The other problem is that client computers often >> don't respect the TTL on DNS records, so they may not respect changes >> promptly. (This seems to be less of a problem now than a few years ago.) >> The upshot is that you need to change the DNS several days before taking a >> machine out of service. > > Why did you use duel A records rather than two MX records? > >
MUA's don't use MX records -- The Exim Manual http://www.exim.org/docs.html http://www.exim.org/exim-html-current/doc/html/spec_html/index.html -- ## 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/
