[rsp1984]

The way I see it he was just very motivated to get the job / internship. I didn't find his emails "professionally immature" either.

For sure I'd much rather invite / interview him as opposed to one of the 100s who just send their CV via email with not much else.

[BlackCherry]

To clarify "professional immaturity" does not mean personally immature/childish. It means he comes across as extremely green, new to the professional world, etc.