如题，是IT 方面的商业书信练习~~
尤其文法跟礼貌的语气不太拿手，希望大大们尽情指教 :D
==================================================================
Subject: Recovery of System Error
Dear valued customer,
Thank you for your reminding. I am sorry to hear about the problems you have
experienced with our system.
After we investigated, the error you pointed out actually resulted from
incorrect settings of the configuration file, instead of any fault in our
source code.
Fortunately, we have fixed the configuration file as attached, and the error
should be solved after you update the file. However, if any other problems
occur, feel free to contact us anytime by e-mail or calling 1234-5678. Once
again, we apologize for the inconvenience.
Yours sincerely.
再次感谢 :))