Yes, they rejected you, and rejection is never easy, but this shouldn't stop you from sending them a thank-you letter.
Sending a thank-you letter after being rejected for a job is a rarity among applicants. After all, who could blame them? After all of that effort, they get rejected. However, it is also important to note that sending a thank-you letter after being rejected just shows your professionalism and maturity.
This is where you need to place your focus. If you can bring yourself to thank a company for taking the time to consider you, then you will truly set yourself apart. This effort will leave your interviewer a lasting impression of your professionalism.
How Does This Help Me?
Sending a thank-you letter is not something that most rejected applicants bother to do. So, why not put in the effort to show that you are different? Set yourself apart and send a thank-you letter thanking the interviewer and/or company and requesting if you could be considered for any future openings.
This small effort can be big for you. You might get a call in the future from the company, or you might be referred to a sister company.
Take the time to write a brief thank-you letter. Remember that in job seeking, networking and professionalism are vital.