You can search your entire mail.com Account at once, i.e. not only your emails, but also your Contacts and your Organizer.
Click the Search button in the top right corner of the navigation bar and enter a search term. Search results will be displayed in a categorized list. These categories are your mail.com Account, your Contacts, your Organizer or the Cloud. Click a search result, to jump right to the appropriate mail.com service.