How to respond to a rejection email from a job interview? what do you think its a good idea to mail back to hiring manager for future opportunity if you are already disqualified from current job opening.

You start your email by a formal and professional greeting, followed by an appreciation for the opportunity given to interview for the current job, then you state your willingness to be considered for future vacant job. 

I think it's probably the best chance  to ask recruiter to give you some feedback on your cv as well as followed by request to be considered for new future opportunities.

But it all depends on how busy the recruiter is, because i personally never got any such reply from any recruiter.

be calm down and try to improve my skills and follow this co. if hey have any opportunity in the future maybe accept me

What to Write

Whom to Send It to. Normal thank-you letters are addressed to everyone who interviewed you. The big-boy/girl letter, however, only goes to the decision maker and/or the HR representative you dealt with, according to Jane Trevaskis, a certified professional coach. “If the [rejection] letter you received is signed by the HR person … thank both of them,” she said. “If it is signed by the hiring manager, you need to send a thank-you note only to that person.”

What to Say. Thank them for considering you for the opportunity, Trevaskis said. Tell them what impressed you about the company or the department you were being considered for. Let them know you would like to keep in touch and would like to be considered for future openings.

Sandra Lamb, a career, lifestyle and etiquette expert and the author of several books on the topic of writing, advises clients to keep the letter brief and very positive. State that you were disappointed, but congratulate the hiring person(s) on having made a selection, and then wish them well.

In a final, short paragraph, Lamb advises that clients reiterate a positive point from their interview that reflected well on the interviewer and, again, state that they’d like to be considered for future openings.

Sample Letter

Lamb provided the following sample of the letter she coaches her clients to send upon receiving the “we aren’t hiring you” notification:

Dear Bob:

I would be lying if I said I'm anything but keenly disappointed that I wasn't your final choice for the position of [job title]. But knowing how professionally and thoroughly each candidate was interviewed, and having made it to the "final [number of candidates on short list]," I'm also honored to have been on that short list. I appreciate that your job of selection was very, very difficult.

It was a pleasure getting to meet you and seeing how well your team works together. [Customize the following: You are a rare and skilled manager. I particularly like your style of relating to your team, and sincerely hope that sometime in the future we get an opportunity to work together. (I agree that my skills are a great fit for your team.)]

I wish you and your team great success. Thank you again for all your efforts on my behalf. I will look forward to seeing you at one of the area association meetings.

Best regards,