It's been for a long time since I wrote a email in English. Let's begin to write a email.
Dear Infrastructure Team,
Hello, I'm back from my winter vacation.
I needed to follow up on our last project.
I've just heard that team leader Mr. Jackson has stepped down, and new manager, Wilson has taken over for him and took on our project.
Whoever my superior is, I'll back him up so that he can move our project forward to a successful outcome.
I hope that we bring up these issues at the next meeting tomorrow.
Best regards, Myeongju Mun