SMTP code X.6.10
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.
- Meaning
- Deprecated (a duplicate of X.6.8)
- X.6.8, in the same table
- A UTF-8 reply is required, but the client did not declare SMTPUTF8 support
- Typical basic codes
- None
From SMTPUTF8 / Internationalized Email (RFC 6530/6531/6532) · Relay and fallback rules, and error codes