For hosting common files it's ok. Also it is on Android too do, great to transfer files between your Windows and your phone. But if you want better security you have to subscribe a monthly offer.
Dropbox - Online Sync and File Sharing
Roundcube - Web-based IMAP email client
Google Drive - Access and sync your files anywhere
HEY - Email at its best, new from Basecamp.
Mega - Secure File Storage and collaboration
Mailo - Mailo is an email client where you can send and receive emails to and from anyone with an email address.