Follow-up and Thank You Letters
CDO advises that a short follow-up email to persons with whom you met is a good idea if (1) you are extremely interested in the employer and would like to reiterate that interest; (2) you thought that you really connected with the interviewer and would like to remind that interviewer of your similar interests; or (3) the interviewer went out of his/her way for you (e.g., treated you to a lavish meal). If you decide to write a follow-up email or thank you letter, you should do so promptly. If you decide to use email (which is preferable given the time crunch), you should still use a professional business format and tone.
Review the sample thank you letters for examples of such correspondence.