Maintain Import-Export Tool Until New Export Tool Matches its Features
If the previous Import-Export tool is being deprecated, please consider waiting until its current features are available in the new export tool before fully deprecating it. These include:
- Exporting by date range (most important)
- Exporting by label or folder (essential)
- Exporting to eml (emails as individual files) mbox (one file for all emails in a folder or label) or similar formats (good to have)
- Append new exports to a previous export's mbox file (good to have)
- Importing emails (eml, mbox, or similar) exported from one proton account to another (good to have)

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J. C. commented
Agree! Proton's GUI Import/Export App was one of the most user-friendly and configurable programs out there for users of any service to download their own e-mail data for periodic backups, or anything else.
The new CLI Proton Mail Export Tool is good for backing up and restoring an entire Proton account at once, but has none of the flexibility or user friendliness of the Import/Export App.
Taking the old app down before improving the CLI at least to the point where the user can specify options like date range and specific alias (versus all of them) seems like a step backwards for users.
Proton's logic seems to be that users who want configurable exports of particular e-mails can still get at them through Proton Mail Bridge and a client like Thunderbird.
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labrat21 commented
Thanks for posting, I just spent 15 mins searching for the app I once had.
Agree this would be good.