Cold outreach in 2026: How do you keep bounce rates low? 📧

Bounce rates are getting worse every year, especially with the rise of disposable and fake emails. I noticed that many validation tools only check the syntax (valid/invalid) but don’t really tell you the true quality of an email.

Out of frustration, I spent the last few months building a lightweight Email Validation & Scoring API that goes deeper:
– disposable detection
– MX & DNS checks
– suspicious patterns
– role-based filtering
– and a scoring model from 0 to 10
I shared the tool on Product Hunt if anyone wants to see how it works or give feedback:
https://www.producthunt.com/products/email-validation-scoring-api

Question for everyone:
How do you validate your lists before running a campaign? Do you rely on syntax checks or deeper scoring?