Re: DNS round robin does not give "fair" load balancing

[Bjørn Ruberg]

ram wrote:
I try load balancing using a relayhost to a DNS A record with multiple 
IP's
But I find that somehosts *always* get more mails than others

Are Windows DNS resolvers involved? If so, see for instance this article 
for a lead on why those resolvers think they know better than your DNS 
round-robin setup: 
http://windowsitpro.com/article/articleid/27025/what-is-dns-round-robin-and-subnet-prioritization.html

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Bjørn