On 1/16/2012 7:15 AM, Charles Marcus wrote: > On 2012-01-15 8:49 PM, Al Zick <a...@familysafeinternet.com> wrote: >> Here is where I am at: I had about 10 of RBLs at one time (including >> some of the ones you mentioned), but I slowly removed them. What do you >> do when people that you need to be in contact with everyday are being >> blocked? > > Don't use the list causing them to be blocked? > > A has already been pointed out to you, the fact that you were using > *TEN* RBLs is prima facie evidence that you really don't know what you > are doing with respect to using RBLs (no offense intended, ignorance is > not a crime, but failure to acknowledge it can lead to poor results).
Let me throw a caveat in here. There is no threshold of dnsbl count use that marks an admin as "competent" or not. It depends on the receiver site. I'm sure there are many large receivers who hit at least 10 dnsbl zones, either mirrored on a local rbldnsd server or directly via DNS, with a combination of scoring or outright rejection. Such sites will probably be querying at least: Spamhaus Zen Spamhaus DBL Barracuda Spamcop PSBL UCEPROTECT URIBL SURBL ivmSIP/24 ivmURI We're at 10 already and I'd guess some sites use more, especially if they score them all. No, not all of these are IP based dnsbls as in the case of the OP, but Postfix can be configured to 5xx reject based on hits in any of them, either directly, via policy daemon, or pre-queue content filter. So using 10 dnsbls isn't necessarily a sign, in isolation, of a lack of admin where-with-all. There is other information in this thread that suggests such may be so in this case. -- Stan
