Every few days I get a "We found some suggestions for you" email telling me to follow people within our own organization. This is a very annoying and useless default option, at least for our mid-sized company. Does anyone know a way I can turn these off for anyone? We're using Sharepoint 2013 on prem.
You can disable the timer job responsible for sending mail for MySite Suggestions Email job.
From Central Administration, click Monitoring
Under the Timer Jobs heading, click Review job definitions
Scroll down (or click through pages) until you find a job called User Profile Service - User Profile My Site Suggestions Email Job