shim - WAS:::Re: Xenosoft in New Haven CT?
other at oryx.us
Fri Feb 26 17:13:03 CST 2016
Was just looking over your shim application briefly.
Just curious, as I see the README.linux note, what OS was your shim application
built for and ran on?
On 02/25/16 05:41 PM, Mouse wrote:
>> At the point where we finally sold the domain to be rid of this issue
>> (and make a few $) we were processing in excess of *300000* messages
>> a day. This is for a 7 person company. It was more than 50% of the
>> email processed by our ISP. Our DSL router throttled the SMTP
>> requests so we could SOME work done during the day.
> Hm? You're implying your ISP was handling your mail, but then you
> imply you were handling your own mail. I'm a little confused.
> The main reason I'm writing, though, is a bit different.
> That there's a company I know that was in a somewhat similar position -
> they were getting so much spam bounce blowback that they were shutting
> off all incoming SMTP during the day to keep the machine up. I wrote a
> very lightweight SMTP server for them; it accepts connections and talks
> SMTP until it gets a valid recipient, and then - and only then -
> connects through to the real SMTP server and passes protocol both ways.
> It was very good at turning away mail to unknown addresses. There was
> one time when some host in south-east Asia opened about 100 parallel
> connections and started a dumb-as-rocks dictionary attack. It turned
> away many tens of thousands of unknown recipients in something like
> thirty seconds, and, even knowing exactly when it happened, I couldn't
> find the blip on our load graphs - it was drowned out by the noise. If
> I hadn't been reading the logs for other reasons and stumbled across it
> I never would have known it happened at all.
> Obviously, it's of no direct use to you now that you don't hold ao.com
> any longer. But in case you - or anyone else - is interested, I got
> their approval to open the code up; it's available to anyone who cares
> to fetch a copy. ftp.rodents-montreal.org:/pub/mouse/misc/mail/shim/
> is the place to look for those interested.
> /~\ The ASCII Mouse
> \ / Ribbon Campaign
> X Against HTML mouse at rodents-montreal.org
> / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B
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