What’s the difference between “message too frequent” vs “policy violation”?

"Message too frequent" and "policy violation" differ in cause and resolution:

Message too frequent (rate-based):

You are sending too fast or too much. Temporary condition. Resolution: Slow down, spread sends. Will resolve with patience. 4xx codes typical.

Policy violation (rule-based):

You broke a specific rule. May be temporary or permanent. Resolution: Fix the violation. Requires identifying and addressing cause. 5xx codes common.

Policy violation examples:

Authentication failure. Content policy breach. Recipient opt-out ignored. TLS requirement not met.

Key distinction:

Rate issues resolve by waiting. Policy issues require action. Rate limits ease automatically. Policy fixes need investigation.

"Too frequent" is driving too fast. "Policy violation" is running a red light. Different infractions, different responses.