G Suite Email Log Search

1. Login to your Admin Console (https://admin.google.com) 2. Click Reports > Audit > Email Log Search 3. Input the Sender Email/Recipient Email/Message-ID (from Gmail Full Message Header) for a more accurate result. 4. Take a Screenshot for the Result 5. Click one of the Results for details, screenshot again with expanding all the "Right arrow" fullscreen (without the cut). Reference for G Suite Email Log Search in this link: https://support.google.com/a/answer/2618874?hl=en
See other articles in G Suite Support, Troubleshooting.