Formal emails also need to have correct grammar, spelling, and punctuation. After you have finished writing an email, read it from beginning to end and edit your sentences. Missing commas or periods might demonstrate to others that you are not careful, which could lead to a bad impression. Use the “spell check” feature to check your spelling before sending the email, and avoid using slang or abbreviations like LOL (laugh out loud) or BTW (by the way). Using abbreviations might be okay for friends, but they might make a bad first impression in work or school settings.