On 07/02/2014 06:45 AM, Axb wrote:
I'm pretty sure, a huge amount of SA users trust Spamhaus' ZEN at smtp level for outright rejects.
At this point, I'm using the defaults, other than upping BAYES_999 enough to enough to total to 5.0 when added to BAYES_99.
If a sender's IP is listed @Spamhaus , he has a serious problem reaching many, many destinations.
Many, many destinations? Or a high percentage of destinations? I recently had to explain to the owner of the company why an important email from one of his business associates at another company was blocked. I told him that they were on a couple of spam block lists (which they were) and that contributed to the mail's rejection.
I made the same pitch. "This should affect their outgoing mail to many sites, etc.". But I'm not sure I believe it. When I interact with people who've had their emails rejected (often related to DNSBLs) I've been listening for any mention of other mails of theirs to other companies being blocked. But when the DNSBL rules in SA are the major contributors to the rejecting, it seems that we are the only domain they interact with which is doing so. Entries in the DNSBL databases do great collateral damage.
And of course none of these companies are spammers. They're with this or that ISP who has, at one time, had someone exploit their servers to send spam.
DNSBL's are like a guy with a bazooka trying to play sniper. -Steve
