First, I wish I could say to you face to face but it seems to be impossible.
I’m writing this e-mail to inform you that I’ll leave ....... and my last day is ................
It was not easy for me to make up my mind but I decided to find a new opportunity.
I remember all of you helped and taught me a lot, it was really honored for me to work with you guys.
I really appreciate what you gave it to me during I work.I have learned and enjoyed a lot with you.
I will also do my best to support you until my last day.
Again, thank you very much for your support and kindness. I wish you all the best.