On Monday 10 July 2006 02:17, Matthew R. Dempsky wrote: > On Sun, Jul 09, 2006 at 05:02:39PM -0700, Thomas Bushnell BSG wrote: > > Another problem is with hosts that do not accept a message from an MTA > > unless that MTA is willing to accept replies. This is a common spam > > prevention measure. > > It also prevents mail from setups that use different servers for inbound > and outbound mail. Hmm. I've not seen this kind of sender verification. As I know it, the receiving MX connects the regular MX for the sender address to see if *that* is ready to receive mail. Works beautifully if outbound != inbound. While very effective, this is admittedly the kind of spam prevention measure which puts some load on the systems on both ends. cheers -- vbi -- featured product: the KDE desktop - http://kde.org
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