b2250e9c_lla_X_Mozilla_Status_explained_X_Mozilla_Status_Description
[Name] MSG_FLAG_PARTIAL [Value] 0x0400 [Description] 
If set, then this message's body contains not the whole message, and a link is available in the message to download the rest of it from the POP server. This can be only a few lines of the message (in case of size restriction for the download of messages) or nothing at all (in case of “Fetch headers only”)
Christian Eyrich - Mozilla X-Mozilla-Status explained
Description