---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/21258#article
headline: "21258: Invalid SIP Manipulation Policy"
url: https://www.twilio.com/docs/api/errors/21258
inLanguage: en
dateModified: 2026-03-11T18:38:39.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 21258: Invalid SIP Manipulation Policy

Log Type: APPLICATION

Log Level: ERROR

## Description

There was a validation error for the Sip Manipulation Policy in question.

### Possible causes

Reference the docs for configuration information - https://www.twilio.com/docs/sip-trunking/sip-header-manipulation

### Possible solutions

Reference the docs for a possible configuation solition - https://www.twilio.com/docs/sip-trunking/sip-header-manipulation