[Slackbuilds-users] Today's DMARC debacle

[Rob McGee]

On Thu, Mar 22, 2018 at 08:34:33AM +0000, Habs wrote:
> Does DMARC have to be specifically setup by a domain admin ? i.e. 
> it can't just be inadvertently turned on.
> 
> I presume it does based on what I read briefly, about adding 
> entries into the domain records etc.

That's how it is done, so yes.  If your domain is delegated to 
someone else to manage the DNS, it's possible that a DMARC record 
could be added without you knowing it.  But if you control your own 
DNS, you'll only set a DMARC record specifically.

> I have to admit until I read 
> about it on this list I was almost fully clueless as to what
> DMARC was (acronyms to the ignorant and all that).

Mail stuff is an awful mess, and DMARC was one of the things to 
exacerbate the situation.

One thing we had to consider is that most of our subscribers use 
email providers, so DMARC is beyond their control.  We don't want 
them to be penalized because of lack of clue (or indeed, malice) at 
their email provider.
-- 
    Rob McGee - /dev/rob0 - rob0 at slackbuilds.org