Each custom filter created should have an option to apply the filter to emails already received, read or unread (or both).

Calendar events set automatically in order (0-9, then a-z)
not in order of entry (in the mobile app this works, on PC it doesn't).

Proton should add the ability for the User to set default font type and font size for all outgoing mail. The current default font type is not acceptable for most business communications. I do not like wasting my time setting the font type and size before I send every message. I desire to continue being a paid Proton customer, for now, but this feature problem is major strike against Proton Mail.

Allow us to create a different color for each of our email addresses to quickly spot which one is most important.

Hello,
Thank you for a great product.
Please consider to port existing widget of iOS into the new iOS 12 widget so that it can be used on a more flexible way and integrated into the user interface.
The existing widget is considered legacy in current iOS.
Thanks

Would be nice to have the "move to" option added to the swipe gesture feature, or, in my case to be changed with the "archive"

When I receive a docx file, it seems that the preview function in the browser is not working and the only way to view the file is to download it first.

Currently pasted inline images are automatically scaled to fit the width of the email in the composition window, even if they are quite small. When received in Gmail, they go well off the page. I used ProtonMail for my business and I can't be sending clients emails that are such a pain to read.

Users need some control over this. It would be great to be able to click on a corner of the image and rescale it by dragging diagonally. Thank you.

When deciding which feature requests ProtonMail will prioritize, please look for duplicate requests and sum votes across them. The requests forum really could use some curation so they are better organized and consolidated. Thank you.

I paid for upgrade but it's not working?

Enable scrolling through the list e.g. by adding more white space or a scrollbar, or allow drag and drop to be turned off.
When using a touch-screen device such as a tablet. I keep changing the order of the list inadvertently as I try to select an entry. It is then difficult to remember the original order - very frustrating.

Es wäre sinnvoll, wenn eine Datei nach dem Klick auf den "teilen"-Link nur angezeigt werden würde, ohne die Möglichkeit eines Downloads. Das würde die Möglichkeit einer unberechtigten Weiterversendung zumindest komplizierter machen und dadurch einschränken.

Select multiple contacts as per deleting contacts. A new shar icon is shown. Clicking the share icon displays a multi-select list of accounts to share the contacts with. Select the users and click "share". The users will receive copies of the contacts (not reference to the original).

Your email is a piece of shit. You called me fraud and I simply made these emails as email for a game that I use. I have multiple game accounts, so I need multiple emails. You locked all my accounts. And how are you even going to get a hold of me about my petition? Your company is pathetic.

Monthly billing instead of yearly for Mail+VPN

When writing a new mail I sometimes need to see behind the Compose window ... but it doesn't move!

It would be nice to be able to apply a tag based on the tag or folder that the message already has.

Having this provided to the users of Protonmail would provide the ability whitelist messages and exclude them from filters based on the tags or folders they are in. There are many other useful ways to use such a feature like this, but I've felt this feature has been long needed. Many people might find it very useful to do so.

I've just used the web application to send an email and attach two files. I really had to look for the attach files button and found it right at the bottom of the composer window. This doesn't make any sense. Could it be moved to the toolbar at the top of the composer window?