Proton Mail currently only supports a single global auto-reply. Users with multiple addresses or aliases have no way to set individual auto-responses per address.

Proposed improvement: Allow users to configure auto-reply settings independently for each email address/alias on their account.

Each address should have its own:

Custom message text — so replies match the context of that address (e.g. professional tone for a work address, casual for personal)
Schedule (date range) — to enable auto-replies only during specific periods, independently per address
Sender filter — choose whether all senders or only known contacts trigger the auto-reply
On/off toggle — quickly enable or disable the auto-reply per address without deleting the configuration
Why this matters: Many Proton Mail users rely on multiple addresses to separate different areas of their life (work, personal, projects, volunteering, etc.). A global auto-reply doesn't reflect this — it either leaks context across addresses or forces users to choose which address gets an auto-reply. Per-address control would make Proton Mail's auto-reply feature truly usable for multi-address setups.