一般按照工作的场合需要不同的方式，不过如果只是需要跟大家寒暄几句的话，觉得直接去面对面的交流更有效，更容易给人好的印象。不过说道你需要一个样板，可以是这样： Dear colleagues, I am xxxx. I will be starting my job at xxx department from today. It was a honor to join this wonderful company. I am excited and looking forward to work with you all and to contribute to the company as a team. Wish you have a great day! Best regards, xxxxx

打个招呼，介绍一下自己，姓名，什么学校毕业的，现在是什么职位，请大家多多关照，就行了

你先要知道对方的邮箱地址呀！