翻译英语“你回邮件的速度比以前快多了”

比较地道的说法：
Your reply for mail is much faster than before。

The speed of your returning mails is quite a lot faster than before.

相信我没错的

You returned to the mail the speed before was quicker than are more than

The speed you replay my E-mail is faster than ever before!

It is quicker for you to reply emails than before.