In the EU, even searching for and storing an email without legitimate interest violates Article 5 of GDPR.

. It focuses on automated driving and intelligent transport systems. "Topic 1" in an Academic Course

If you’re filtering incoming mail or logs:

The search query "1 Carlos -hotmail.com -aol.com -yahoo.com -gmail.com"

This search string is a targeted Boolean query designed to find individuals or accounts named associated with professional, corporate, or niche email domains while specifically excluding major free webmail providers . Search Query Breakdown

These four domains represent >90% of free consumer email accounts globally. They are:

Each element of this search string serves a technical purpose to refine the results: