Re: Value of backup MX
On Wed, 10 Nov 2004, Craig Sanders wrote:
> if you do have a backup MX, then you need to have the same anti-spam
> & anti-virus rules as on your primary server AND (most important!) it
> needs to have a list of valid recipients, so that it can 5xx reject
> mail for unknown users rather than accept and bounce them (known as
> "backscatter").
Oh you mean reject mail for unknown recipients rather than bounce the
mail[1]. Ok, I can see why you are suggesting it but it is an RFC
violation. Not that I'm necessary saying not to do it but one must walk
towards RFC violations fully aware of the fact (for the benefit of those
reading along at home).
[1] I thought you were suggesting the MTA should drop mail from unknown
senders - a type of brutal white list :)
Rob
--
Robert Brockway B.Sc.
Senior Technical Consultant, OpenTrend Solutions Ltd.
Phone: 416-669-3073, Email: rbrockway@opentrend.net, http://www.opentrend.net
OpenTrend Solutions: Reliable, secure solutions to real world problems.
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