Job promotion announcement email is sent to your closed ones after you have received a promotion offer letter from your organisation.
It is very important that you should address the person very respectfully and know about his/her email address.
The first paragraph of the email should contain the news of your promotion from the current post to the new post. It should also mention the date from which you have been or will be promoted.
The second paragraph of the email should contain information about your responsibilities at the previous post and what will be your responsibilities of the new post. You should express your happiness with your promotion and tell them that you had a reasonable increment along with additional benefits.
In the third paragraph of the email, you should ask the person to spread the word and tell him/her about the celebration party for your job promotion.