[GTALUG] We are having DMARC/DKIM troubles ...

[Alvin Starr]

On 06/12/2016 02:23 AM, ac at main.me wrote:
> On Sat, 11 Jun 2016 18:24:43 -0400
> CLIFFORD ILKAY <clifford_ilkay at dinamis.com> wrote:
> <snip>
>> This is obviously a problem for non-technical users. They simply do
>> not understand any of this and it all becomes too complicated for
>> them. Most users do not know how to add anything to their address
>> book or create message filters/rules and they think the list server
>> is broken and should be "fixed" when in fact, it's their email
>> provider.
>> I never see these issues with subscribers who have Gmail accounts, by
>> the way.
>> Email is dying a slow death. The alternatives, like Twitter direct
>> messaging, Slack (ugh!), WhatsApp (double ugh!), and various instant
>> messaging schemes are worse. Those will eventually be polluted by
>> spammers, too.
>>
> Would like to start my reply by saying that I received my first spam in
> 1987, from CompuServ and that imnsho email will never die, it is too
> well suited to human nature.
>
> These days, I am trying all sorts of new ways of trapping new spam bots
> and figuring out how to get more spam, more data, more bots.
> Huge multi nationals like Google etc do not share their data
>
> To understand the small spam problem in 2016, one has to
> understand the differences in modern email.
>
> Mass email providers like @gmail.com @yahoo.com @hotmail.com are
> hard/difficult to block - and they know that - so some of them, like
> yahoo.com for example, does not spend as much money as say google.com
> does - to fight abuse.
>
> If @dinamis.com would dare to send spam - @dinamis.com would simply end
> up in a rbl
>
> Our rbl's commonly block at least 100 yahoo servers for each single
> google.com server and the blocks last anything from an hour to weeks,
> depending if they stop their spam
>
> Interestingly, if Google is blocked for spam they bounce back to their
> user with : technical error at the receiver - this is kinda evil as it
> implies that their is a problem at the receiving server, when Google
> full well knows that their is an admin restriction due to Google being
> abusive...
>
> branding I guess, users have to be kept as mushrooms for as long as
> possible so that the large guys can dominate and take over the world :)
>
>

All you need to end up on an RBL is one hacked user.
Been there. Cleaned up after that.

If you have a few tens to hundreds of million of clients(like the big 
guys)  you will have lots who are compromised and now sources of spam.
Its amazing the the big guys don't have all their mail servers blocked 
all the time.

Your right that its annoying that the big guys seem to get by without 
paying attention to the rest of us.

As an aside some times I get the feeling RBLs are getting close to being 
extortionist in their tactics.
I have had clients with mail servers that get black listed and they find 
themselves having to pay to get off some of the RBL's.

-- 
Alvin Starr                   ||   voice: (905)513-7688
Netvel Inc.                   ||   Cell:  (416)806-0133
alvin at netvel.net              ||

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