It's all a matter of style and consistency. Some choose to capitalize only the first word, e.g. (using your example) The title of this question. Others capitalize the key parts of speech in the title, excluding conjunctions, prepositions, and the like: The Title of T/this Question. In some cases, all the words in the title are capitalized:
How to Reply to Confirm an Interview. When confirming a job interview, type a one-page letter thanking the interviewer for the invitation to the job interview. Confirm the exact time, date and location of the interview to avoid arriving at the wrong location on the wrong day or time. Send the letter within 24 to 48 hours of receiving the invitation. (Creatas Images/Creatas/Getty Images)
Re: Confirming an interview... Originally Posted by Filipbg. I am confirming by e-mail an appointment for an interview and I would write something like this: I would like to confirm my attendance at the Skype interview scheduled for Wednesday 15 March 2014 at 12.00. My Skype name is....