An option to send notifications/email all admins on child sites

Hi,I would love to have the option to send an email/notification to all admins/selected admins of all or selected child sites.That way, I could easily update admins of eg new wp releases, new PHP updates and plugin updates - and ask them to be aware/or check their website for issues related to the various updates.Please upvote if you find this useful too.Regards,Chrilles