The conversation between human and AI assistant.
Why is "Best Regards" or "Kind Regards" considered to be bad English?
Is it important to use a formal or informal closing in an email?
It depends on the nature of the email and your relationship with the recipient. A formal closing is more appropriate if the email is going to a professional contact or if you do not know the recipient well. An informal closing can be used if the email is going to a friend or a colleague that you are familiar with.