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6 changes: 5 additions & 1 deletion content/docs/tech-resources/extended-error-codes.md
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---
lastUpdated: "01/28/2022"
lastUpdated: "06/08/2026"
title: "Extended Error Codes"
description: "When developing to the REST api you should be prepared to handle failed requests understand their meaning and what actions are needed to resolve them The following table is a complete list of extended error code responses organized by the four elements included in the response array Component The related..."
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| | 2006 | Transmission record in invalid state | 409 | |
| | 2007 | Metadata size too large | 422 | |
| | 2008 | No local part specified in sender address | 400 | check if provided email is correct |
| | 2009 | Unconfigured tracking domain | 400 | create/use a tracking domain configured for this account or subaccount, then retry |
| | 2010 | Unverified tracking domain | 400 | add the required CNAME, verify the domain (POST /api/v1/tracking-domains/{domain}/verify), then retry |
| | 2011 | Compliance pending for tracking domain | 400 | wait for compliance review to complete; contact Support if it does not clear |
| | 2012 | Blocked tracking domain | 400 | use a different verified, compliant tracking domain, or contact Support |
| | 2101 | Exceed Sending Limit (hourly) | 420 | |
| | 2102 | Exceed Sending Limit (daily) | 420 | |
| | 2103 | Exceed Sending Limit (sandbox) | 420 | |
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