554 5.6.0 Other or undefined media error

Meaning

An undefined media or content error occurred.

Common causes

• Unsupported content type.
• Bad MIME formatting.

How to fix

1. Check email content formatting.

Example bounce

554 5.6.0 Other or undefined media error

Related codes

• 554 5.6.1 Media not supported
• 554 5.6.2 Conversion required and prohibited
• 554 5.6.3 Conversion required but not supported