I now use the version is 3.8.2, found that the server does not support the XEP - 0184: the Message Delivery Receipts).
And find the following information:
[OF 722] Openfire should save XEP - 0184 delivery receipts as offline message - Jive Software, Open Source
And in 3.9.2 already fix
[OF 722] - Openfire should save XEP - 0184 delivery receipts as offline message
But did not describe the content of the https://igniterealtime.org/issues/secure/attachment/12270/patch.txt.
What reason?