While using webmail pages, try to enter https instead of http. This will make sure that your login information is encrypted and not exposed on the wireless network. Social networks also have the option of providing you with httpspages so that you can use secured encrypted pages instead of normal ones that are not encrypted. For example, when using Twitter, use Your data would be safer this way. In case of webmail, however, they provide https only for the login page and not for the other pages that let you compose mails and view emails. You can see if the option is available by prefixing https to the URL in the address bar. If you get 404 error, the encrypted page does not exist. In such cases, it is advised you use some sort of encrypted network over the hotspot.