| Admin here. Of course you can. You should always assume you can. Even if I couldn't read the email (which I can, but fortunately have never actually had the need to or done so), I can always reset a password and gain full and instant access. You should always assume your employer can see your enterprise correspondence. G Suite or not. |
Just to expand here. You should assume that your employer has access to _everything_ that you do with their assets. If you are trying to maintain privacy from your employer for whatever reason, do not use your work phone/laptop/email/etc.