Is there such an option or a "workaround" to check the behaviour a group of people (a list or a specific delivery) over other deliveries?
So if I sent a Delivery #1. I want to check all the poeple of Delivery #1 across all future deliveries. And with check I mean, see Opens, Clicks, OPt-Outs, etc.
You can verify that by creating a workflow something like below logic:
1) fetch all the recipients of delivery#1
2) Use enrichment activity and do reconciliation using recipient delivery logs. Keep join condition as email address. This will give you recipient delivery logs of email addresses targeted in delivery#1. It will give you all the deliveries those recipients are targeted.
3) Based on your target group you can perform your next action.
I don't get it. People from Delivery #1 will be split in the next deliveries, some random will be in #3, others in #7 and so on.
How could I get the Opens, Clicks, etc from those deliveries, but only taking into account the group of #1 delivery?
Use delivery code of Delivery #1 and use that to get all the details you required from that delivery and use this in next one. So it will be like one query to fetch delivery # 1 details and then enrichment to pass required details and then use it as you like.