Bounce code OU-001
What the knowledge base's own tables say about this code, and which articles say it — a description of the reply, never a placement prediction.
This line comes from a knowledge base article on Microsoft, not on the standard.
- Symptom
- 421 RP-001/002/003, 550 SC-001..004, DY-001/002, OU-001/002, or mail sent to Junk at @outlook.com, @hotmail.com, @live.com or @msn.com
- System
- Consumer Outlook.com
- Channel
- Sender support form (below), after the SNDS and JMRP prerequisites