To: [Insert name]
From: [Insert name]
Subject line: Post-Interview Rejection
Hi [candidate name],
We enjoyed meeting with you to talk about the [role title] at [company name]. However, we have decided to go with another candidate for this role.
It is worth noting competition for jobs at [company name] is competitive but we will be sure to keep your resume on file for future openings that we believe suit your profile.
Thank you again for your interest in [company name] and best of luck in your job search.
[Insert email signature]