[Mp4-tech] I have a quenstion

[zy]

hello,
I have registered a e-mail address to be added to the mp4-tech list. The address is yzheng_jd sjtu.edu.cn. I had used this address normally for sending questions and receiving other letters for three days.after that, I changed my e-mail address as yzheng_jd yahoo.com.cn to the list because the capacity of the latter is much bigger. But since then, I never received any letter from mp4-tech neither in yzheng_jd sjtu.edu.cn nor in yzheng_jd yahoo.com.cn. 
What\'s the problem, or what shall I? thank you very much.
Regards.
Yan Zheng