554 5.6.3 Conversion required but not supported

Meaning

The message required conversion but it was not supported.

Common causes

• Missing transcoding capability.
• Format mismatch.

How to fix

1. Send in standard format.

Example bounce

554 5.6.3 Conversion required but not supported

Related codes

• 554 5.6.0 Other or undefined media error
• 554 5.6.1 Media not supported
• 554 5.6.2 Conversion required and prohibited