Hi all, i'm confused with the receiver of email-alert after comme

Hi all,

i'm confused with the receiver of email-alert after commenting on the tempo.
based on my test, not only the sponsorer, but aslo others will receiver an email in some case,
and not all cases, all users.

i'm wondering what's exact rule of this email-alert?
or are there any reference docs about this?

many thanks.

ps, i know we can do some configuration in custom.properties. but it seems we can only configure sending time.
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OriginalPostID-104805

OriginalPostID-104805