I don't know of anything like that at the moment. However, it wouldn't be hard to build.

>From: (sadasant) at 04/19/23 15:32:49 on wss://nos.lol

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>This reads like an email. Is there a way to use Nostr as if it was an email list? I’m thinking, something that could send me a summary of the timeline per day, and that I could email to post a message?