Sign in

Withhold message types the messenger API cannot transmit

The composer refuses oversized media the Messenger Send API does not accept, before the Operator attempts to send it.

When this happens: Operator attaches a file in the composer.

Step by step

  1. 1

    Attaches a 40 MB video to a reply.

    EasyCRM checks the file against the capability declaration (max 25 MB across attachment types) client-side. Rejects the attachment inline: This video is 40 MB; Messenger accepts up to 25 MB.

  2. 2

    Attaches a 10 MB video instead; it is accepted.

If something goes wrong

Client bypassed, server re-validates

A send request reaches the server for an oversized attachment (e.g. A non-standard client). Rejects with EasyCrm:Channel:ContentTypeNotSupported; nothing is sent.

Good to know

  • The composer only offers what Messenger's declared capability table supports (text, image, audio, video, file, each ≤ 25 MB).
  • Validation happens both client-side and server-side; the server is authoritative.