Why not rely on regular email?
Using an email service to exchange sensitive data is both unsecure and insufficient. Most email services have file-size restrictions for attachments, including 20 MB in Outlook and 25 MB in Gmail. Files bigger than that need to be broken up and sent in multiple pieces, putting your data further at risk.
Did you know...
Of the 1,390 major HIPAA breaches in 2015, 116 list email as the source of the breach.
Source(s): http://www.databreachtoday.com/email-breaches-lead-to-wall-shame-a-8695