What is Tonsho?

Tonsho is an email service with two special features:

• Easy sending of large file attachments
• Filtering spam by authenticating users

File Sending

Normally a large email attachment, usually over 5Mb, will bounce back marked undelivered. So if you're trying to send a set of photos, a large report with graphics or extensive reference sections as an attachment they just won't be delivered. Currently Tonsho allows you to send files of up to 100Mb, that's 20 times larger than a standard email service usually allows! Over time this limit will increase to 1Gb.

It also allows you to do this without having to upload the attachment separately to a website - you just send an email as normal with the attachment, using your usual email client (e.g. Microsoft Outlook, Mac Mail or Thunderbird on Linux). This is hassle free, heavyweight mail.

Step 1: Bob attaches files to email	Step 2: Alice receives email and clicks on link	Step 3: Alice is taken to the download page

Spam Filtering

Unwanted spam (junk) email is the problem that threatens to take over your inbox. Standard spam solutions seek to resolve this by automatically recognizing spam emails before they reach your inbox and sending those emails to a junk folder. However these systems are flawed - all too often you will miss important emails from customers or friends as they will have been incorrectly identified as spam and never make it to your inbox. This problem is known in the industry as false positives.

The vast majority of junk mail comes from computer programs known as automated emailers. Tonsho eradicates this problem by getting users to prove they are human and genuinely interested in contacting you. This ensures that all valid mail can reach you, whilst effectively blocking all the auto-generated junk.