A follow-up email should be sent after the interview to everyone who interviewed the applicant. Email is the quickest way to thank interviewers for their time. The email should be sent within 24 hours of the interview.
In the thank-you email, several topics should be covered. Reiterate your interest in the position and the company in the email. Highlight any relevant skills that show you are qualified for the position. Mention anything that was forgotten during the interview in the email. Finally, proofread the email before sending for grammar and spelling errors. Remember to get interviewers' business cards so that they can be easily contacted with the follow-up email.