Bouncing email doesn't make much sense if you can reject easily (which would be your case). Running an inbound SMTP server is much easier than running outbound

Bouncing email doesn't make much sense if you can reject easily (which would be your case). Running an inbound SMTP server is much easier than running outbound smtp for laypeople. The software (postfix, exim, etc.) is rock solid (you have to REALLY mess up to lose emails) and the protocol is very forgiving (all serious senders have good retry policies). I encourage you to try!