Email Security Features

Written by Christopher Lee

Last published at: October 5th, 2021


To enhance security and help prevent being compromised by phishing via email following are features enabled in respective services:

  • Office 365 (
  • Google (

Office 365 (K12)

  • Quarantine
  • Unauthenticated sender
    • Picture will appear as a '?'
      • When Microsoft can't not validate that sender is authenticate
    • "via" tag in From field ( via
      • When Microsoft detects sender as different from sending domain
  • First contact safety tip
    • When first time get a message from sender 
    • When don't often get messages from the sender