Could You please specify if there are undesirable mails in the ton of mails you get or if you are just saturated of information ? Suggesting as a solution to retry sending mail again and again will worsen the problem. You'll get echos in addition to signal.

Maybe people in your situation should use a pull method (~on demand messages) using a web service for this purpose. People who want to get in touch with you see the number of messages in the queue and you may pushback (temporarily suspending message submission) and provide priority to users. They'll see their queue position and eventully some feedback once processed tldr, not understood, contact me @xxx, ...