----- Original Message ----- > Rob McEwen wrote: > > > On 1/31/2012 12:40 PM, Phil Daws wrote: > >> Just to follow up we have seen a huge decrease in the amount of > >> SPAM > >> received since we implemented the Invaluement RBLs. > > > [snip] > > PS - you mentioned that you were going to try greylisting next. Be > > careful because greylisting (1) can cause annoying delays and (2) > > some > > e-commerce systems, newsletters, and alert systems are not setup to > > do > > a retry--so order info can get lost due to greylisting > > I would recommend not doing full greylisting, i.e. not for all > clients. > Use a set of criteria to greylist a subset. Criteria: DNS, HELO, > etc. > In my experience, selective greylisting is way more effective than > any > RBL. > > > /Per Jessen, Zürich > >
Agreed. Looking at using a logic engine and rolling our own system using http://nodejs.org -- Thanks, Phil
