Not promotional- looking for feedback from the community on whether would be widespread fear around using such an app on work email. Tech and product people get bombarded with email all the time, so we thought an app that charges unsolicited senders $ for email delivery would greatly reduce the noise. However, initial testers have expressed FOMO and general fear of ridicule if they were to start telling people they need to pay to email them. Trying to understand if tech folks here would feel the same.

Dont understand what this is about? is this premotional?

If I understood correctly it filters all your non white-listed emails and ask the senders (marketers) to pay money if they want you to receive their mail.

Correct, it allows you to set a $ amount for someone to reach you on email (if you haven't whitelisted the person or they've never contacted you before).