Bounce code RL000003
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 Comcast, not on the standard.
- Basis
- The history of volume and of the quality of that volume; independent of the number of domains; applies to IPv4 and IPv6
From Comcast / Xfinity — Postmaster: Error Codes, Rate Limits, Unblocking · Rate limiting (RL codes)