The best time to send an email is Sunday at 3:00 p.m, a survey found, but experts warn this could be a form of 'techno-invasion'

• The best time to send an internal work email is Sunday at 3 p.m. because it's more likely to be opened. 
• Experts warn that it could make colleagues feel like their personal lives are being invaded by work. 
• A new study by Axios analyzed the average open rate of 8.7 million emails sent on its platform. 

Workers looking to get ahead will find that Sunday afternoons are the best time to send an email, according to a new study.