Accepted Content Types for Media

When you send an outbound message, the total message size must be under the maximum size limit for the channel. An API request with media or a collection of media larger than the size limit will fail with an error.

• For a media message, the maximum size limit is 5 MB.
• For an RCS media message, the maximum size limit is 16 MB. When sending an RCS message that requires fallback to MMS, message sizes exceeding the MMS limit of 5 MB will be rejected.
• For a WhatsApp media message, the maximum size limit is 16 MB.

To make sure users see the correct file name for a media attachment, include the Content-Disposition header in response to a media fetch request.

Content-Disposition: inline; filename="<expected filename>.<extension>"

• Don't use spaces.
• Keep file name to 20 characters or less.
• Avoid using most special characters such as ~ ! @ # $ % ^ & * ( ) [ ] { }.