No more than being rejected for a job phases me.
I am a process oriented person, meaning I bulld out a system that works and then I know that no matter what happens, it's simply a matter of me putting enough time and effort into it while tweaking things as I go before it pays off.
So whether it's OLD, approaches in person, applying for jobs, etc, I don't get hung up on immediate results because at the end of the day I know I have a process that works for me and as long as I follow it, results will always be there once I let it play out over time.
So no, rejection doesn't phase me. If anything it drives me to work harder to overcome it.
The problem most people have is they are results oriented rather than process oriented.
Just because you get a positive result doesn't mean you have a good process for sustainable results and just because you get a bad result doesn't mean your process doesn't work.
They are two separate things.