Match Leads on normalized email domain plus company name.
Choose a field and how closely values must align. Add at least one rule to detect duplicates.
Scenario wizard, step 1 “Match rules”. Matching types (full picklist): Exact, Fuzzy, Numeric, X-Letters (with length), Street Address, Word Mapping (Clean Company Name), Word Mapping Fuzzy (Clean Company Name), Word Removal, Word Removal Fuzzy, Alpha and Numeric characters only, First Word only, Relaxed Phone.