Hello Andy,
Why would those not be subject to this? We can 'block' most on customer
level. And this is done like that also.
This seems to be an argument in favour of identifying the customer
id in the headers, not for requiring COI. Which is indeed rational
since it makes it more likely that a disgruntled admin will block
only the ESP's client, not the whole ESP.
Yes... but...
Not only related to headers. Many of senders have beautifull click
trackers and they are pretty easy to use as pointers. And sure some have
shared use but likely this means its time for those ESP's to change that
concept that they designed a decade ago...
(Shameless plug)
Have a look at the CT bit that SURBL implemented some months ago.
https://www.surbl.org/lists#ct
Bye, Raymond
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