How to delete a message from the API ?

[ph1949rst]

Is it possible to delete a message from the InBox via the API ? I tried setting the DELETED flag on the message, I get a 204 response, suggesting it was OK, but it doesn't seem to have any effect.
Is it possible to see these flags from the Web Client ?

[zumbo_oxinia]

Have you tried sending a HTTP DELETE message, as described in the API guide?