Interception by Email Provider

Office
Email sent from an office computer must typically travel extensively across corporate networks and backbones prior to reaching the cloud itself (to reach which it may possibly also have to go through a commercial ISP.) While traveling across the corporate network, messages are effectively open to interception by many different people such as coworkers (in addition to people who may legitimately have an interest in auditing messages such as system administrators or security officers.) Corporations also typically act as email providers for their employees.