i created this last summer
(test just email gpt@franzai.com)
sadly it never took off so it just became another abandoned side project
but still sometimes I use it ie do distill long emails or translate them without leaving the inbox - also the reminder and todo list feature is nice - whereby i mostly use the "remind me of this email next monday"
so my learnings for email agents: give them a sense of time and memory. its not only about that you write an email and send it but also when to write whom