I am going to quit my job.All of my work will be taken over by my Joe.If you have any problem later,you can contact him directly.His contact is as follows:
个人觉得好一点的:
Dear all
it is regret to inform you that I will resign form ** company,Joe will take charge all my daily duties.wish you have a happy association.If you have any problem pls don't hesitite to contact him.
(下面附他的联系方式)
Regards!