Advanced Email Verification Intelligence System

Project Overview:
I want to build an advanced email verification system that classifies any uploaded email ID into:

Valid

Invalid

Catch-All

The core challenge — and the real scope of this project — is Catch-All intelligence.

Most tools today only detect catch-all domains. I want to go one level deeper:

If an email is catch-all, the system should predict whether it is likely deliverable or dead, without sending test emails or buying third-party data.

In short:

Upload any email → System returns:

Valid

Invalid

Catch-All (Likely Deliverable)

Catch-All (Likely Undeliverable)

This is not a basic SMTP check project. It is about building logic, heuristics, and prediction mechanisms for catch-all emails.

I am looking for someone who:

Deeply understands email infrastructure (SMTP, MX, DNS, bounce logic, server behavior, handshake patterns, etc.)

Knows how modern email verification tools work internally

Has ideas or experience with:

Catch-all domain behavior analysis

Server response pattern analysis

Timing, greylisting, tarpitting, and rejection behaviors

Domain reputation & historical behavior modeling

Predictive logic for deliverability without sending emails

Can propose a clear mechanism, flow, or prototype for how this can be built

You do not need to build the full product upfront.
Your first task is to submit:

The technical approach

The logic flow

The mechanisms you will use

How the system will decide:

Valid vs Invalid

Catch-All

Catch-All but likely deliverable vs dead

Only candidates who understand this problem at a system level should apply.