On Tue, Sep 22, 2009 at 10:21 PM, LuKreme <krem...@kreme.com> wrote: > On 22-Sep-2009, at 14:42, Aaron Wolfe wrote: > >> Also consider the invalument block lists, see >> http://dnsbl.invaluement.com/ >> A very, very good list that is usable for blocking. Not free, but >> very affordable. >> > > I don't like how involvement does their pricing structure, actually. > Firstly, I don't feel comfortable telling a 3rd party how many 'users' I > have. Secondly, I don't feel like determining what they consider a 'user'. > Third, because of my HELO/EHLO restrictions and rejection of unknown users I > make FAR fewer RBL calls than most mailservers (I reject about 87% of all > connections, and 98% of those rejections are in HELO/EHLO or unknown, Only > 0.66% over the last week rejected by zen's RBL), so if I used invalument, it > would probably only be for a handful of callouts per day but I would be > paying the same amount as someone who was using it to do many tens of > thousands of callouts per day. > > If you used the invalument lists, you would not be doing *any* callouts per day. The list is provided via rsync, you serve it from your own DNS servers to your MXes. You rsync the entire list every few minutes. Thus all sites, 10 users or 10 million users, use the same amount of invalument's resources to aquire the list. This is not what you are paying for.
You're paying for the time and effort that the maintainer has put into making this list so good. How else can such a system offer a fair payment structure, if not by basing it on the number of users who benefit at each site? > Sure, $20 a month is not a lot of money, but looking at my mail I figure > that would be costing me about 1/2 a cent per check, if not more (I average > out only about 1000 checks of zen per week), assuming I made exactly as many > checks to involvement as zen means slightly over 1/2 cent per check. > > Most people would value this is terms of the time they save by not dealing with the spam, or in a larger organization the reduced calls to tech support about spam + the time the employees save by not getting the spam. You might also find that there is great value in the reduced load on your content scanners, because the invalument list can cut the traffic making it to these resource hungry systems quite dramatically. The list has save my organization many times its cost simply by reducing the number of content filtering nodes we have to run, or in other words allowing us to support more paying customers on less hardware. Everyone is entitled to their opinion, but for us the invaluement RBL is a no brainer. Sorry to sound like an advert here, practically all these same reasons are used to justify the purchase of a Zen rsync feed when you outgrow their free level of service. That will cost you quite a bit more, but still generally worth it in terms of support and hardware savings. -- > Don't congratulate yourself too much, or berate yourself either. > You choices are half chance; so are everybody else's. > >
