1) 感谢

　　开头，感谢别人回复自己的邮件(也可以用thank you，用在稍微正式场合，比如和陌生人发邮件)

　　— Thanks for the quick reply.

　　— Thanks for getting back to me.

　　— Thanks for the update on the situation.

　　— Thanks for the updated information.

　　— Thanks for gathering the information this week on this issue.

　　别人发邮件提供信息给你，中文邮件是懒得回的，英文邮件也习惯感谢，简单回复一个。

　　— Thank you.

　　— Well noted.

　　— Noted/Received with thanks.

　　— Good information.

　　2) 道歉

　　— Sorry for the late reply.(中国人普遍用这一种，也有老外用，不过下面两种更多)

　　— Sorry I haven’t got back to you sooner .

　　— Sorry for the delay getting back to you.

　　— 如果是上一封邮件没写清楚导致收件人误解了

　　I apologize if this was not made clear

　　— 提前给别人预警如果自己的措辞过于强硬。

　　I apologize if this may make you feel uncomfortable/bad.

　　I apologize if this may sound a little harsh.

　　3) 收尾套路

　　— Please let me know what you think.

　　— Please let me know your thoughts.

　　— Let me know if you have any questions or concerns. (最常见)

　　— Please let me know if there are questions.

　　— Looking forward to your input/insight(用insight/input代替opinion)

　　— That’s my idea, what's your idea?(也有直接这样说的)

　　— Please review the lengthy e-mail and provide feedback on how we can proceed.(如果邮件太长了)

　　或者，干脆下面的话结尾，

　　— I'll let you know more tomorrow(表示今天没说完，明天再说更多)

　　— Please call me if you like.(有什么事打我电话)