---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/80910#article
headline: "80910: Message To Voice Only Session Rejected"
url: https://www.twilio.com/docs/api/errors/80910
inLanguage: en
dateModified: 2026-06-08T12:04:59.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 80910: Message To Voice Only Session Rejected

Log Level: WARNING

## Description

This warning appears when Proxy receives an inbound message for a Session whose `mode` is `voice-only`. Proxy Sessions support `message-only`, `voice-only`, and `voice-and-message`, so Proxy rejects messaging traffic for a voice-only Session.

### Possible causes

* The Session was created with `mode` set to `voice-only`.
* Your application expected one Session to handle both calls and messages, but the Session was not created with `voice-and-message`.
* The Proxy numbers available to your Service were selected for voice handling, while your messaging flow still routed an inbound SMS to that Session. Proxy number pools can contain numbers with Voice or SMS capabilities, and in many countries numbers support only one of those capabilities.

### Possible solutions

* Create the Session with `mode` set to `voice-and-message` if participants need to communicate over both voice and messaging.
* Create the Session with `mode` set to `message-only` if the interaction should support messaging only.
* Review your Session creation workflow and choose the correct `mode` before traffic begins. The Session create API accepts `mode`, while the Session update API does not expose `mode` as an update parameter.
* Verify that the Proxy numbers in your pool are SMS-capable if you expect inbound messages. In many countries, you need separate numbers for Voice and SMS.

#### Additional resources

* [Session resource](/docs/proxy/api/session)
* [Proxy Quickstart for SMS and Voice](/docs/proxy/quickstart)
* [Phone number management](/docs/proxy/understanding-phone-number-management)