Periodic vs Realtime RBL checking

[inferencia]

Hi guys,

I was wondering if there was a way that this RBL checking could be done periodically, like once every hour, and store that list some where instead of having the machine make a connection with each email that comes in.

It seems as RBL checking comsumes much resources and wondering if this would let it breath somewhat, since IPs that get reported stay reported at least 12 hours after the last report. So cheking every hour should still be efficient?

 

[nobaloney]

If I'm understanding you correctly you're asking that the millions of domains in the RBLs at any given time be downloaded into your system every hour.

Sounds good to me. How much memory do you have?

Or are you asking that once a domain is looked up it's kept in local memory?

If so, then note that DNS does that by default. So the lookup is only to your DNS resolver (the nameserver listed in /etc/resolv.conf). Which is faster than any other kind of lookup.

Using DNS to find RBL listings is the most efficient way to do it.

Jeff

 

[inferencia]

Right on

Didnt know it worked that way. Í should have figured it was working the best way possible anyhow

Cheers !