Having the whole client open source is awesome for many reasons, but I think particularly for vetting the security of the server side, open sourcing the app code for the server would be a good next step. There are tons of TypeModels for API endpoints (https://github.com/tutao/tutanota/blob/master/src/api/entities/sys/PaymentDataServicePutReturn.js) but we have no idea what those APIs actually do. :) Particularly with payments, I did not expect payments details to go through Tutanota's API so directly (from the client), and I wanted to see how the server interfaces with the payment gateway.

Thanks for the great product :)

I would like to leave the Google universe, but have so much data in Gmail, that it seems like too much work. If it were possible to transfer my Gmail folders and email, that would be fantastic.

Tutanota needs buttons saying "MARK AS SPAM" and also "NOT SPAM" for when e-mails are in your spam folder that shouldn't be. This would be a very useful feature.

The inbox rules were a big step forward, but the folders need improvement. When I get a notification for a new mail, I always need to check every single folder to find it.
So, I have the following suggestions:
- display in notification which folders have new mails
- display in app the number of new mails near the folder name, or just make it with a different color or something until you first tap on it

Thank you, I'm glad that I bought premium!

I've found the spam filter completely useless most of the time, with it marking things such as invoices, shipping confirmations, and account updates as spam. I would be nice to have the option to completely disable it.

I see that the beta version logs IP addresses...could you get rid of that feature please? Or just make it optional, and don't log IP by default?

If a user can't access his account, then he has to contact the tutanota team by e-mail. This implies that he has to register a new account, although only one free account per user is allowed. For this reason, a contact form could be filled and upon submission of this form a code number (support ticket) will be given to the user so that he may follow up the status of his request.

Save all should create a file with all your attachments in a .zip file instead of 20 separate downloads. Most times the browser will freeze upon clicking save all because the site sends like dozens of download requests at once.

After the update was disgusting and not convenient to work in the phone and on the computer. Why it was necessary to spoil the application working correctly I do not understand.

Many sensitive documents may go through Tutanota, therefore many users may want to access it with full anonymity.
I suggest using BOTH I2p and TOR for this.
This post may get a lot of hate as it is very disputed between TOR and I2p and which is better for hosting encrypted and anonymous services. This is why I ask for both to be supported and not just one.
For Info on the what makes I2p and TOR different: https://geti2p.net/en/comparison/tor

Another bonus of using TOR/I2p is because of the added encryption over HTTPS.

Add an option to give a folder a color.

Every folder has the same color. Tutanota looks and feels great, but with gmail and protonmail you can work with color label and folders.

For my business it is great to put the same type of clients in different folders with the same color. Would be very helpfull!

I wonder why the industry-standard 256-bit AES encryption was not chosen. Today I found that my entire Tutanota email library has disappeared! No sign of it anywhere in my bookmarks.
Browser-based JavaScript cryptography used by Tutanota is considered very insecure. Given what we now know about the extent of the NSA’s assault on encryption standards, most experts agree that AES-256 provides a higher security margin.

Everytime I reply to a message, why does it send as a seperate email, on Gmail you can reply, but for Tutanota, it sends it as a seperate mail and when the person replies to me I get a seperate email back, this is kinda stupid and I was hoping that Tutanota can fix this issue.

Having a few thousand mails in my inbox, I find it hard to scroll down to reach one of my earlier mails. It is very unmanagable..

It should be possible and way more convinient for most of us if you would use pages. For example show max of 100 mails per page and to see the older 100 you can select te second page.

After the update was disgusting and not convenient to work in the phone and on the computer. Why it was necessary to spoil the application working correctly I do not understand.