The story I'd sent out was "Under the Surface"

This is what it said:
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Thank you for your submission.

I apologize for the delay in response time, which is due, in part, to the overwhelming amount of submissions.

At this time I will have to pass on your story, though I encourage you to send more submissions my way.

Thanks again for the opportunity to view your work.

Chris
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I am not an expert on the subject, not yet anyway, but the key line in this is "I encourage you to send more submissions my way" - I would imagine that is a personalized response, though I've not received one before. That is a good thing, isn't it?