On 07/02/2014 03:54 PM, Steve Bergman wrote:
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.
You are discussing about DNSBLs but not being specific.
With millions of sessions/day I'm glad Spamhaus keeps my servers from
melting.
I'll let others sell you this Hoover.
