Larry, when handling a sizeable amount of emails to parked domains this
is what I did too.
Instead of auto responding (my first attempt failed because I did use
auto-responders which caused the domains to get spamhaus rbl listings.)
to every email sent . I sent the non-deliverable message after the RCPT
TO (DATA could work too I just didn't want to keep the connection open
that long) and returned some sale pitch back the the requests for the
parked domain owners.
554 This person doesn't exists. I see you're trying to email %domain%?
Check the spelling of your recipient. If you're trying to purchase this
domain, contact 555 132 1234.
There were a bunch of different 544 messages based on the parked domain
owner requests. It's been a while but with the help of my engineers one
machine then also could handle 30k connections/requests per second so it
was very efficient too. Interestingly walmart sent those domains the
most emails. I don't think they ever stopped even after the failure
notice. :P
k
On 11/7/2021 9:18 AM, Larry M. Smith via mailop wrote:
On 11/6/2021, Dan Mahoney (Gushi) via mailop wrote:
All,
I have email for my whole domain. I'm typically known to sign up for
services with vendor@mydomain, so that when an email gets retired or
leaked, I route it to /dev/null, or in the event of a leak, retire it
from the original place (say, [email protected]) and auto-route it
to spam reporting and bayes learning.
One of my older ones: [email protected] was a general purpose one,
and thus for that one, rather than just routing it straight to
sa-learn, I put in an autoresponder saying "the spammers won this
address, if you really want to contact me, use this".
Here's the thing though.
Spam is coming to me with VERP'ed addresses. It's getting
autoresponded to. Those autoresponses are then bouncing back to me
as undeliverable.
So...you're a spammer. You're going to the trouble to do VERP.
You're throwing the responses on the ground, or even blocking their
receipt. Or your VPS got suspended (which I'm sure you saw coming).
What's the bloody point here? I mean, I know there doesn't have to
be one, buy I'f love to hear ideas as to what the possible use case is.
I mean, logically, one thing I could do is have my autoresponder
detect the verp'ed format to this address specifically, and not
attempt to respond to it (and in fact, I could report on/train on it).
The autoresponder is for legitimate humans trying to contact me
directly (i.e. nobody who will use verp). In the few years since I
realized this address was a lost cause, nobody's tried. (Although I
have started getting spam at gushi2015@domain, so that's some
intelligence).
You might find a better operational experience by just rejecting the
messages in SMTP post DATA with a URL for a whitelisting web page. E.g.;
550 Rejected for spam. Please see
https://www.example.com/wl?e=<email_token>&d=<date_token>&i=<ip_token>
At least then you'll have a chance for the humans to see it w/out all
of the possible back-scatter and queues possibly filling up do to MX
records being forged and/or offline.
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