Although texting has led some to question whether we need to be concerned with correct spelling, in the legal world, words and their usage matter.  Although it is unlikely you will slip abbreviations into your work product, remember that e-mails, both internal and external, are professional communications.  Don’t be the summer associate whose casual e-mails include sentences where the first word is not capitalized or excessive use of emoticons.  If you find yourself in a situation where you need to consult a grammar guide, the Purdue Online Writing Lab (affectionately known as OWL), is a great resource.  The site includes tips for Workplace Writers.  If you scroll past the advice on resumes and cover letters, there are sections on e-mail etiquette, using appropriate language, comma usage, and much more.  You can also e-mail the OWL staff if you do not see an answer to your question.