今天收到三次EMAIL LUD 485, 不明白

以下是內容:

On November 9, 2005, your I485 Application to Register Permanent Residence or to Adjust Status was
received here for processing. It is taking between 850 and 900 days for us to process this kind of
case. We will mail you a decision as soon as processing is complete.

不明白為什麽要給我發EMAIL LUD? 還是三個重複的MESSAGE. 我和老婆的CASE都發了. 以前LUD都沒EMAIL. TSC, NIW140 9月批的, 10月21做的CODE3 FP.

多謝指教!