Remy (https://remyreads.nl/) is a newsletter aggregator that summarizes and centralizes them.

An email address is created for new subscriptions or forwarding of existing letters.

Two models are available, small and premium. Access to the original letter remains possible.

Advertised as GDPR compliant.
Seems to summarize only in English, tests in progress for French.

1 dedicated email address, 10 unlimited premium summaries and small summaries with no choice of time to send per day in the free version.