Data validation involves several steps to ensure the accuracy of email addresses:
Syntax Check: This checks whether the email address format is correct, including the presence of "@" and a valid domain. Domain Validation: Ensures that the domain of the email address exists and can receive emails. SMTP Verification: This step involves checking with the mail server to confirm that the email address exists and is active. Role-Based Address Check: Identifies and filters out role-based addresses (e.g., info@, support@) which may not be ideal for marketing. Catch-All Server Check: Some domains accept all emails sent to them, regardless of validity. This step helps identify such domains.