Up to 500 times more efficient
Horizon Mail is purposely designed to look and feel like a low-bandwidth email application. It is up to 500 times more efficient than other common email applications.
The user doesn't pay to download useless information as Horizon strips away all HTML overhead and headers. And body texts are compressed too.
In addition, the user has full visibility and control over what they download. They can download the email subject headings first and then select which ones they actually want to open. And then decide whether they want to open any associated attachments based on the file size.
Likewise, when the user writes an email, they can see how much data they would consume for the body text and any attachments before they decide to send.
Further optimisation is achieved by storing email in a local cache and the same technique of gathering internet socket requests is applied as for accelerated web browsing.