In our tests we did list requests for 100 messages and then bulk requests for each messages' headers (messages.get("me", message.getId).setFields("historyId,payload/headers")).
I'll look into that option and re-run the tests.
In our tests we did list requests for 100 messages and then bulk requests for each messages' headers (messages.get("me", message.getId).setFields("historyId,payload/headers")).
I'll look into that option and re-run the tests.