Hi @BretThompson, I hope you’re doing well!
Thank you so much for sharing the link.
After reviewing the documentation, I noticed that indeed, the Marketing Email V1 API will soon be sunset.
There’s a helpful thread discussing this topic: “Marketing Email API: v3 released to general availability and upcoming sunset for v1” where I see you posted your question (thank you).
I am adding the reply here so that it can help other Community Members who will find this thread:
"This sunset only affects the marketing email API endpoints beginning with the url /marketing-emails/v1/emails. There are no changes to other email related APIs at this time, including the email analytics API
The allEmailCampaignIds field has now been added to the v3 API, and should include the same IDs that you would get from the v1 API in the same format of an array of IDs."
I hope this helps!
Bérangère