What does Yahoo’s “policy reasons” bounce actually mean?

Interpreting Yahoo policy bounces:

What "policy reasons" means:

Yahoo has blocked delivery due to their filtering policies

Intentionally vague to prevent gaming

Usually reputation or complaint related

Common causes:

High complaint rate from Yahoo users

Poor sender reputation

Content triggering filters

Volume patterns flagged

Investigation steps:

Check Yahoo FBL for complaint data

Review recent Yahoo engagement metrics

Compare to other provider performance

Resolution:

Improve list hygiene for Yahoo addresses

Reduce volume to Yahoo temporarily

Focus on engaged Yahoo users first

Yahoo cites "policy" without specifics. Usually means your reputation with their users is poor.