Changes at "Email to confirm proposal submission"

Is your feature request related to a problem? Please describe.
As a user submitting a proposal, I need immediate confirmation that my submission was received. Currently, there's uncertainty about whether the action was successfully processed by the system.

Describe the solution you'd like
An email notification for the user immediately after they submit a proposal. The notification should confirm that their proposal was successfully received by the platform.

Describe alternatives you've considered
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Additional context
This should not be affected by batch notifications since it is time sensitive.

Does this issue could impact on users private data?
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Open Source Politics