Hi Jeff
On Friday, February 11, 2005, 8:00:35 AM, test test wrote:
I'm adding SURBL support to the urlbody plugin of spampal. Spampal is a freeware windows local proxy anti-spam application, with a userbase of almost 100.000. (http://www.spampal.org/)
I use only multi. At the moment only JP, but this will become a configuration option. Probably also with a "two out of all" option .
- I've added a local skiplist with about top half of the public
"whitelist", no need to query those.
- Domains are only queried one time per e-mail (the local pc
DNS service would probably cache those, but anyway added...).
- If the're moere than 20 domains to check, only the first (or
last) 5 are done.
Any suggestions are welcome.
Alain
Sounds good!
The only thing I would request is time-based caching of list lookups to cut down on DNS lookups. Can you set up some kind of caching of names that persists say for 15 minutes and lives across messages?
As far as I know this will be done by windows. Maybe not for 15 minutes, but for at least a couple of minutes.
Generally speaking it may be better to apply this kind of filtering at the server level since there are economies of scale, especially in terms of things like DNS lookups and caching. If we suddenly get 100k more DNS clients, that could tax the name servers somewhat. If those same 100k users were using 100 servers instead, the DNS loading would be quite a bit less. In that sense centralization is desirable.
Mmmm isn't the dns server from the ISP caching the dns requests? I would think it doesn't make a big difference (except when a server is rsync'ing). The difference could be that end users check their e-mail not when arriving on the MTA, but later.
Alain