I would like to suggest an improvement to Proton Mail's email labelling system.

Currently, when conversation view is enabled, applying a label to an email also allows subsequent messages in the same conversation to inherit that label automatically.

However, when conversation view is disabled, this functionality is no longer available. New incoming emails must be labelled manually, even when they belong to an existing conversation that has already been labelled.

It would be very useful to have an independent setting that allows users to automatically apply an existing label to all future incoming messages belonging to the same conversation, regardless of whether conversation view is enabled or disabled.

Why this matters

For users who prefer to view every email individually, disabling conversation view makes it easier to track incoming and outgoing messages separately. However, losing the ability to automatically label new messages makes email management less efficient.

For example, if I label an email as "To process", any subsequent reply in the same conversation should automatically receive the same label, even when conversation view is disabled.

Proposed solution

Allow labels to be associated with a conversation independently of the conversation display setting, so that future incoming messages automatically inherit the relevant labels.

This would provide greater flexibility without forcing users to choose between their preferred email display and efficient email organisation.