Sorry for the trouble my friend. I'll reply here so anyone else
interested can see it. I know my strategy isn't well received here,
though if I'm being honest, I care more about results than opinions so
I'll ask that if anyone would like to berate me for it feel free to
reply off list. I'm rather used to being berated for everything I do
that isn't exactly like the way other people think it should be done.
But with the way spammers rotate through IPs on networks that
exclusively or almost exclusively send spam these days, what I do is
effective.
It was my determination that the spam to ham ratio from Aptum's ASN fell
so hard toward spam that whitelisting the good senders was more
effective than blacklisting the bad senders. That doesn't have to mean
it's all gigantic numbers, I could do a log audit and find 250 total
emails in 60 days but if all 250 are spam then it falls on the side of
"I'd rather whitelist what people actually want from here, because it
clearly isn't much."
Most of the time I get it right. On rare occasions I miss something. It
looks like I missed PolarisMail. It doesn't seem that Polaris customers
and ours converse enough that it landed on the radar, but now they can
freely. I've whitelisted their ranges.
Our customers are informed on how to get around this if we happen to
block something they want. Both in terms of filtering they can disable
if they desire, or whitelisting if they want me to exclude someone who
got caught in it. We're up to blocking almost half a million spam emails
per day with this strategy and whitelist requests have dwindled down
from a small campfire to a single burning ember, which is exactly the
way I was hoping the numbers would go after a few months of running this
way. Whoever intends on replying off list to berate me, I hope you read
to that part ;)
Jarland
On 2026-03-10 22:34, Scott Q. via mailop wrote:
I apologize for the public contact but direct messages to Jarland are
also bouncing.
Jarland, can you check why your servers are blocking messages from
65.39.216.0/25 , 69.172.250.0/24 , 66.179.84.0/24 ? Bounce says:
45.43.208.31 does not like recipient.
Remote host said: 550 Unauthenticated mail not allowed from this range
to protected domain
Giving up on 45.43.208.31.
That's when I tried e-mailing you to inquire about some customers of
ours receiving similar messages. We obviously have SPF/DKIM enabled...
Thanks!
Scott
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