Disable email sending to imported listings

I made some modifications so that imported listings are with future date and they will be live when those date are current. The issue is that after they become live the system sends emails to those emails from imported listings and I have fake, generated emails therefor sends a lot of emails that have no recipient. How can I disable email sending for listings that are imported? Thanks!

I would use filter and check if mail is fake or not.

I would use filter and check if mail is fake or not.

Could you elaborate a little please? Sounds like a good idea but emails are with real TLDs.

Added new option "Blocked Email Domains" into latest version of plugin.