How to respond positively to a scientist's rejection e-mail (PhD program)? I am a Molecular biology post graduate from India. I enquire about PhD vacancy to various potential principal investigators (PhD supervisors) by sending my CV and cover letter. When I receive a rejection mail like mentioned below, how do I respond to the scientist? I would like to have good rapport with the lab as I aspire to join the lab later. Or should I ask any questions? 

Examples of rejection e-mail:


  Thank you for your interest in joining our lab. Unfortunately, I'm not looking for a phd student. Good luck





  I am sorry but the lab is full
I would probably not bother to reply; the negative answer that you got seems to have to do with the fact that there are no open positions. The best you can do is to keep an eye open for PhD positions being announced in the future.