Spying how? If you embed a URL in emails then a lot of corporate email gateways will blindly follow the link, trying to check it for malware. This may or may

Spying how? If you embed a URL in emails then a lot of corporate email gateways will blindly follow the link, trying to check it for malware. This may or may not be a useful security measure but it has many issues. One of which is that it could look like spying.