邮件开头 英语情况是这样的..遇上了一个问题,然后想给过去的老师写一封邮件问他应该怎么做.但是不知道信件开头应该怎么去稍

Dear June(举例）：
How is everything going?I am willing to tell you something new about my recent school life.
I always think school life is borning,but after I got along with my friends these days I changed my mind.I have already adapted to my school life and I am making attempts to be a mature boy(girl)both physically and mentally.
My teachers are very responsible,they always give me some useful advice and encourage me to chase my dream.I really appreciate it.
How about you? Looking forward your early replay.

Missing you Sincerely!
peter
这是书信的一般格式,虽然要求是非正式的,但只是针对内容,正确的格式能让人觉得你很真诚,并且是尊敬别人.