> Would love to hear if the same applies to SEO and/or spam filters. I'm the founder of an email monitoring service. I can confirm that lesser known TLDs can

> Would love to hear if the same applies to SEO and/or spam filters. I'm the founder of an email monitoring service. I can confirm that lesser known TLDs can impact deliverability, but not much. It mostly happens with smaller email services that use white/black lists for spam filtering. These are often self-hosted email services. We've also seen 'enterprise' email security products that use hardcoded TLD lists. Larger services such as Google, MS, Yahoo, etc don't seem to suffer from this, as they use ML based spam detection. We've also seen email address validators that do not accept fancy TLDs, which can make it difficult to register to services with a fancy TLD email address.