On 7/7/21 4:03 pm, Alessandro Vesely via dmarc-discuss wrote:
If I outsourced my mail to google (to stick to the example) what other
providers' SPF record do I have to include? Oh yes, John said "to several
providers". Why does one need more than one provider, then?
A mailbox provider is only one of the service providers that an
organisation might contract to send email on its behalf. Other common
examples include:
* Marketing automation (list management, sending mailouts, analytics)
* CRMs, where sellers use the CRM itself to send messages to their
customers
* Subscription management systems that send expiry reminders
* Helpdesk systems that send responses to user requests
There are dozens or hundreds of less common examples.
DKIM is a more scalable approach, but it's also harder to get right
initially. (It's extremely simple once it's working, but...)
Dmarcian has a good SPF compiler already. It is somewhat unpractical, as you'd
need to copy its result to your zone file, and repeat that operation as often
as needed. It doesn't sound awful to call it from a cron job.
This is a *vastly* higher level of technical expertise than most
organisations have available for this.
It is easier to adapt existing software to your special needs than change the
rest of the world.
The target is not limited to technical organisations who are capable of
doing this.
- Roland
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