Hello Athe3na.
I have emailed you a couple of times, and of course it's okay if my work isn't in line with what you're looking for.
But if you expect people to write to you, you should write back, even just to say no.
A negative answer requires all of 6 actions:
1: Click "Reply"
2: Select a pre-written sentence: "Thanks for sending us your portfolio, but your work doesn't meet our needs"
3: Ctrl+C
4: Alt-tab to the email window
5: Ctrl-V
6: Click "Send"
If you're looking for and screening artists, part of your job is actually rejecting the ones that don't fit the bill.
If you can't take a minute out of your day to do this, which again is part of your job I don't know why or how you expect others to make the effort to contact you.