Correcting invalid email addresses involves several steps:
1. Identify the Error: Determine whether the error is a syntax issue, domain problem, or a non-existent user. 2. Automated Tools: Use automated tools to suggest corrections. These tools can often identify common typos and suggest the correct domain or structure. 3. Manual Review: For addresses that tools can't correct, a manual review may be necessary. Look for common patterns and make educated guesses. 4. User Confirmation: Where possible, reach out to users to confirm their email addresses. This is particularly useful for high-value leads.