Is powernap supposed to play sound notifications?

My macbook is always connected to the power adapter and I use it in closed lid clamshell mode with an external display and input devices. I believe my macbook does sleep in the night but often times I hear new mail notification sounds from my speakers in the night and in the morning! I believe it might be fetching emails using power nap but my question is, is it supposed to play sound notifications during power nap?
Please let me know so that I can ensure if my macbook is entering proper sleep or not. Any log I can see to find out if it has slept at given times?
Neerav

Hello there, AceNeerav.
The following Knowledge Base article provides some great information about Power Nap and the question you ask:
OS X: About Power Nap
http://support.apple.com/kb/ht5394
Silence
During Power Nap the lights go out on your computer. System sounds also run silent with no fans (Flash storage Macs only, not including Fusion Drive). When your Mac wakes up, it’s ready to go.
Note: If you use the Play Sound or Send Message feature of Find My Mac, Power Nap does not make a sound.
Additionally this article may enlighten on why your Mac may not be entering sleep mode:
Mac OS X: Why your Mac might not sleep or stay in sleep mode
http://support.apple.com/kb/ht1776
Thanks for reaching out to Apple Support Communities.
Cheers,
Pedro.

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<img src="https://dl.dropboxusercontent.com/u/1869826/FileChute/Untitled.jpg"/>
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