Let's say you have '@example.com' in whiteListedDomains, because it is an 
important partner of your company.
A spammer abuses a known good address, eg. charly....@example.com - so, 
the mail will be processed as whitelisted and passes assp.

But - the domain owner of 'example.com' has configured a valid DKIM 
environment.
Assuming that the DKIM-identity used in a DKIM-signature by 'example.com' 
is  'charly....@example.com', you can now define the following in 
'DKIMWLAddresses' (and remove  '@example.com' from whiteListedDomains)

charly....@example.com
or
*@example.com
or
*@example.com=>*@a_local_domain.org

In this case, whitelisting is done only if - the mail is DKIM signed and 
the DKIM-identity (and localDomain if defined) is verfied and matches any 
defined entry.
This makes it impossible for spammers to successfully abuse the defined 
entries  (make an email passing assp, because a domain/address is simply 
whitelisted)

An example domain for such a scenario is sourceforge.net  - this domain 
DKIM-signs (IMHO) every mail. 



The same way it works for 'DKIMNPAddresses' and noProcessingDomains

Thomas






Von:    "Daniel Miller via Assp-test" <assp-test@lists.sourceforge.net>
An:     assp-test@lists.sourceforge.net
Kopie:  "Daniel Miller" <dmil...@amfes.com>
Datum:  07.06.2019 22:21
Betreff:        Re: [Assp-test] DKIMpassAction use case?



On 6/6/2019 6:53 AM, K Post wrote:
> Now that DKIMpassAction is no longer just a hidden option, can you 
> explain use scenarios again?  I understand what the GUI is saying, I 
> just can think of reasons why anyone would want anything other than the 
> (newly) 0 default.
> 
> DKIMWL and DKIMNP has been life changing for us.  Really incredible. I'm 

> just not sure how DKIMpassAction would be beneficial above that.

Can you give some examples of how you use those that are "life changing"?

--
Daniel


_______________________________________________
Assp-test mailing list
Assp-test@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/assp-test




DISCLAIMER:
*******************************************************
This email and any files transmitted with it may be confidential, legally 
privileged and protected in law and are intended solely for the use of the 

individual to whom it is addressed.
This email was multiple times scanned for viruses. There should be no 
known virus in this email!
*******************************************************


_______________________________________________
Assp-test mailing list
Assp-test@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/assp-test

Reply via email to