On 2025-10-19 at 05:59:57 UTC-0400 (Sun, 19 Oct 2025 12:59:57 +0300)
Atro Tossavainen via Postfix-users <[email protected]>
is rumored to have said:
My take is you are using way too many RBLs. I'd suggest
using at MOST three.
I'd tend to agree.
b.barracudacentral.org
I wouldn't touch Barracuda with a 10 foot pole. This is a policy
issue,
nothing to do with their current data quality, of which I have no
idea.
Their data quality is chronically poor. Their DNS infra was weak when I
last tested the DNSBL, often not responding or responding slowly.
They started life out being a spammer. This in itself is enough for
me.
Then they tried to sue Vern Schryver, if memory serves.
I do not recall either of those being true, but I'm kinda fuzzy about
the late 90s. I do recall that at one point they called their obviously
SpamAssassin-derived filtering "proprietary," at a later point they had
me down to Ann Arbor for an ops sysadmin job interview that went
nowhere, and in recent years they've blocked SMTP outbound addresses
used by 2 of the MSPs that I've worked for, despite no discernible spam
having come from those addresses.
My non-use of their blocklist is not at all due to their ghosting me
after that interview. It would have been hell to commute. The fact that
they've blocked IPs whose mail flow I knew to not include any
discernible spam. I am not even grumpy about their freeloading on SA.
Then they were a backscatter-o-maton in incredible numbers because
their appliances were configured in a shitty way by default and not
possible to fix.
I DO recall that. My assumption is that they've generally fixed it OR
those machines have gone to the dump.
[...]
bl.spamcop.net
Can result in a lot of false positives.
Far fewer than in the past, mostly now theoretically of the consumer
behemoths. Most of that is spam anyway for the customers I serve. I
haven't had a FP anyone cared about in many years
dnsbl-1.uceprotect.net
dnsbl-2.uceprotect.net
UCEProtect are wackos that I wouldn't go anywhere near.
Amen.
hostkarma.junkemailfilter.com
Barely maintained as the original maintainer kicked the bucket in
2018. Before that, misinformed and backscatter-o-maton.
I don't use that list for Postscreen because it was always late in
listing. However, it is my understanding that it HAS been taken over and
maintained since Marc's death.
psbl.surriel.com
One of my choices.
+1.
--
Bill Cole
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