On Thursday 1 July 2004, paul at clubi.ie (Paul Jakma) wrote:
>On Thu, 24 Jun 2004, Enda wrote:
>>> Lets face it, a backup MX doesn't solve any of those problems anyway,
>>And are a huge spam-backdoor. Unless you somehow manage to
>synchronise policy and knowledge of valid accounts between primary
>and backup MXes.
Yup - and I've just turned off a server which was doing MX backup for a couple
of dozen domains, and basically doing very little for those domains but
handling spam bounces from non existent addresses which a secondary MX
couldn't reject at SMTP time. It seems to me that with the reilability of the
current internet, the original requirement for a backup MX is not really there
anymore, and all they now do is serve as spam vectors.
I'll be sure to let the list know if anything untoward happens.
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