Right now when previewing an attachment in the Android app it is first downloaded to the regular Downloads folder and then opened with another app.

Ideally an attachment would be previewable in the Proton Mail App, similar to how it is possible in the Proton Drive app.

Alternatively, it could be shared with another app without first being downloaded to the Downloads folder. Other Mail apps like Boxer do this.

The current behavior is very tedious as you have to manually go to your Downloads folder to delete files you only wanted to preview.

Related: https://protonmail.uservoice.com/forums/284483-proton-mail/suggestions/7808634-preview-attachments