Bounce code ES000010
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.
- Meaning
- Sending from IP space that Comcast classifies as dynamic or residential (usually because the rDNS does not look static)
- Next step
- Change the rDNS to a static naming convention. If your provider cannot, escalate to Customer Security Assurance
From Comcast / Xfinity — Postmaster: Error Codes, Rate Limits, Unblocking · Policy error codes (ES, DM)