What is “temporarily deferred due to user complaints”?

"Temporarily deferred due to user complaints" indicates reputation damage:

What it means:

Recipients are marking your mail as spam. Complaint rate has exceeded acceptable threshold. ISP is throttling your delivery. This is a warning signal.

Complaint rate context:

Safe: Below 0.1%. Concerning: 0.1-0.3%. Critical: Above 0.3%.

Why temporary:

ISP is giving you opportunity to fix. Complaint rates can improve. Full blocking not yet warranted.

Required actions:

Check feedback loop reports. Remove complainers immediately. Review list sources and acquisition. Audit content relevance. Reduce sending volume while fixing.

Complaint-based deferral is the yellow card. Fix the problem before it becomes a red card (full block).