大家发邮件的时候，开头和结尾一般怎么写啊？

发邮件是我们每个成熟职场人都要做的事情，但是发英文邮件的时候，可能会不知道怎么下手。经过不懈努力，好不容易找到了模板，写出来的邮件却怎么看怎么像Dear John Letter。

开头：

(适合周一)

I hope that your week is off to a great start.

Hope you had a great weekend.

I hope you enjoyed your weekend.

(适合周五)

I hope you're having a great week.

I hope you're having a wonderful day.

(任何时候)

I hope this email finds you well.

Hope you are doing well.

Hope everything goes well with you.

How are things with you?

Hope all is well.

结尾：

(表达感谢)

Thank you for your help/time/assistance/support.

I really appreciate the help/time/assistance/support you've given me.

Thank you once more for your help in this matter.

(需要跟进)

I look forward to hearing from you soon.

I'm looking forward to your reply.

Please advise as necessary.

I would appreciate your immediate attention to this matter.

(提供信息后的结尾)

If I can be assistance, please do not hesitate to contact me.

If you require my further information, feel free to contact me.

If you require any further information, please let me know.

Please feel free to contact me if you need any further information.

Please let me know if you have any questions.

Should you need any further information, please do not hesitate to contact me.

Please contact me if there are any problems.

Let me know if you need anything else.

Drop me a line if I can do anything else for you.

Bonus：

邮件内容发错了，需要重发该怎么说？

Please disregard my previous email and refer to this one instead. I apologized for any confusion this may have caused. Thank you for your time.