antdudeA Ninja AntPremium,VIPReviews:
reply to Doctor Olds
Re: Is anyone having problems with smtpauth.earthlink.net:25?
said by Doctor Olds:Ah, interesting and thanks. said by antdude:
Hmm, I am using OpenDNS though.
That's not a factor.
Although easy to implement, round robin DNS has problematic drawbacks, such as those arising from record caching in the DNS hierarchy itself, as well as client-side address caching and reuse, the combination of which can be difficult to manage. Round robin DNS should not solely be relied upon for service availability. If a service at one of the addresses in the list fails, the DNS will continue to hand out that address and clients will still attempt to reach the inoperable service.