Congratulatory email on promotion to boss

Here's an example of a congratulatory email on promotion to boss:

Subject: Congratulations on Your Promotion to [New Title]!

Dear [Boss's Name],

I am thrilled to hear about your well-deserved promotion to [New Title]! This is an incredible achievement, and I want to extend my warmest congratulations to you.

Your hard work, dedication, and exceptional leadership skills have not gone unnoticed. You have been an invaluable asset to our team, and your promotion is a testament to your outstanding performance and commitment to excellence.

As you take on this new role, I have no doubt that you will continue to inspire and motivate your team to achieve great things. Your ability to build strong relationships, drive results, and foster a positive work environment has been a key factor in our team's success, and I am confident that you will continue to excel in your new position.

Please know that you have my full support and encouragement as you embark on this new chapter in your career. If there is anything I can do to help you in your new role, please don't hesitate to reach out.

Once again, congratulations on your promotion! I look forward to seeing the amazing things you will accomplish in your new role.

Best regards,

[Your Name]

You can customize this email to fit your personal style and relationship with your boss. Remember to be sincere and specific in your congratulations, and to highlight your boss's strengths and qualities that made them deserving of this promotion.