Most ecommerce merchants are non-technical, and utilise 3rd party platforms (Shopify, Bigcommerce etc) that in combination with their Payment Gateway don't support these systems.

I can safely say that every order my business has received with a Tutanota address has turned out to be fraud. It is a really strong indicator for a fraudulent transaction.

There are many other signals, but for some reason this is a really strong one.

We see a similar trend with Aleeas, and Simplelogin.

We still get fraud from Gmail and Outlook addresses, but it is picked up using other indicators, IP, IP owner, Shipping Address, phone number reachability, carrier, Payment Methods, name, useragent, "for lease" or "for sale" status of the delivery address etc etc...

Yet for some reason they're not already using gmail, meaning as far as frausters are concerned there is a benefit to using tutanota.

> and all you accomplished is that you inconvenienced legit Tutanota users.

No what you've accomplished is reduce tutanota fraud to 0, and inconvenienced frausters.