Does the ISP > Marketo feedback loop still function?

[Barry_Moffat2]

We consistently send around 5-6 million emails per month, and have done so for years. However we only have 8 unsubscribed customers where the unsubscribe reason contains "Customer Complaint Received from ISP" (or even just the word "complaint") per the knowledgebase article below:

https://nation.marketo.com/t5/knowledgebase/feedback-loops-fbl/ta-p/248685

While I'm confident in our general content, segmentation and list hygiene practices, this still seems highly unlikely. Are any of you seeing unsubscribe activity with this unsubscribe reason or similar right now?

Thanks, Barry

[Chris_Morris1]

Hi, Barry. Just curious - were you able to filter by the phrase 'Customer complaint received from ISP'? How did you determine you had 8 people, and only 8 people, with that status? Thank you! 

I'm trying to id the number of people I have with this status, but I don't find 'unsubscribed cause' as a filter. 

[Chris_Morris1]

Rather, the ISP complaint bit  is not populated in 'unsubscribed reason'.