[DATE]
[NAME AND ADDRESS]
Dear [NAME],
I was delighted to speak with you on [DATE, ex. Monday] and I thank you for your time. I am confident that your skills and abilities will be useful in the [FIELD OF BUSINESS, ex. computer industry].
As you are aware, our firm is seeking applicants with [PREREQUISITE APPLICANT FAILED TO MEET, ex. five years of work experience in the corporate computer sales industry]. Since you do not satisfy this prerequisite, we are unable to offer you a position with our firm at this time.
However, your resume has been preserved and placed on file for future reference. If a suitable position presents itself, I will be pleased to get in touch with you. I thank you for your interest in our firm and I wish you the best in your career.
Sincerely,
[YOUR NAME]