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headline: "50511: Invalid message media content type"
url: https://www.twilio.com/docs/api/errors/50511
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dateModified: 2026-05-05T17:40:20.000Z
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# 50511: Invalid message media content type

Log Level: ERROR

## Description

An invalid multimedia attachment content type was supplied.

### Possible causes

* The MIME content type of multimedia attachment you are trying to send is not acceptable for this conversation.

### Possible solutions

* Make sure that the content type of multimedia attachments conform to channel constraints. Check for accepted MIME types in [API documentation](/docs/conversations-classic/conversations-limits#media-limits).