[kwlug-disc] About spamming techniques [was: Nextcloud 11]

[Bob Jonkman]

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Jason wrote:
> If [a spammer] get a notification for blocked messages, [spammer]
> can iterate parameters until you figure out the exact
> configuration.

Even worse, it causes spam backscatter. If a spammer spoofs your email
address as sender, then when my mail server sends back a delivery
failure message it'll go to you. It's a clever way for spammers to get
their mail to you via my spam rejection rules.

- --Bob.



On 2016-12-14 03:20 PM, locklin.jason at gmail.com wrote:
> On Wed, 14 Dec 2016 14:53:30 -0500 Bob Jonkman <bjonkman at sobac.com>
> wrote:
> 
>> The worst are the mail servers that silently discard messages
>> without informing either the sender or the recipient. Not only
>> does neither side know that the message wasn't received (or that
>> it even exists), it also explicitly breaks RFC specifications.
> 
> I suppose that is so that spammers can't automate "learning" how to
> get through the spam-filter? If you get a notification for blocked
> messages, you can iterate parameters until you figure out the exact
> configuration.
> 
> 
> _______________________________________________ kwlug-disc mailing
> list kwlug-disc at kwlug.org 
> http://kwlug.org/mailman/listinfo/kwlug-disc_kwlug.org
> 

- -- 


- --
Bob Jonkman <bjonkman at sobac.com>          Phone: +1-519-635-9413
SOBAC Microcomputer Services             http://sobac.com/sobac/
Software   ---   Office & Business Automation   ---   Consulting
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