Details & Download
This will dispatch an email every time a visitor to your site posts a comment to one of your pictures.
Requires Sendmail to be available to PHP.
Very basic addon.
Caution: Spamfilters might tag the email as spam. At least my Thunderbird install did that first incoming mail.
Addons are files that once uploaded to your addon-folder extends the functionality of pixelpost. The extra functions can be small, like Email Note, or larger ones, not yet thought of.