附件是……，请参阅。

Please kindly find the attached ……

Attached please kindly find the ……

Enclosed is the ……, please kindly find it.

Attached you will find……,

我已经收到您的邮件。

I have received your email (yesterday/last week/this morning……).

Your email has been received.

非常感谢您的回信。

Thanks very much for your early reply.

Thank you for your email.

我明白您的意思。

I know what you mean.

I understand what you mean.

Got it. （*非常口语化，适合于关系很熟悉的同事朋友之间。）

我不太明白您的意思。

I do not quite understand what you meant.

I have some problem understanding what you meant.

您能具体解释一下么？您能在说的清楚一点么？

Could you please put it in a clearer way?

Could you please explain it in detail?

Could you please further explain it?

What do you mean exactly by saying……？

如有问题，请随时和我联系。

Contact me if you have any problem.

If there is any uncertainty, feel free to contact me.

Call me if you have any problem.

如有建议，请指出。

Please let me know if anything needs to be improved.

Your advice/suggestion will be greatly appreciated.

我会进一步修改/检查的。

I will further modify it.

I will further check it.

一旦确认，我会立刻/第一时间通知您的。

Once confirmed, I will let you know immediately.

Once confirmed, I will notice you ASAP. （*ASAP=as soon as possible 尽快）

希望尽快得到您的回复。

I’m looking forward to your early reply.

Your promote reply will be greatly appreciated.

Your early reply will be highly appreciated.

谢谢。

Thanks a lot.

Thank you very much.

Many thanks. （*用于关系熟悉的同事朋友间。）

希望您一切都好/万事如意。

I hope everything goes well with you.

I wish you all the best.