https://bugs.winehq.org/show_bug.cgi?id=28661
--- Comment #6 from Rosanne DiMesio dimesio@earthlink.net --- Function get_notify_email_address_list in user.php has the following comment:
// If both appId and versionId are null we are especially // requesting to email admins, so the mail should be sent // regardless of global emails setting
That's the only thing I can find that might be related, though I don't see how it's being triggered, as the random emails I see are linked to valid applications and versions, so the ids shouldn't be null.