Making certain that every email address in your Marketo account is valid and deliverable is key to successful email campaigns and lead nurturing efforts. Email Validation can help you: 

• Save on Marketo and lead costs: stop paying for bad leads and prevent them from entering Marketo.
• Improve ROI and campaign performance: reduce bounce rates and increase opens by ensuring every address is deliverable.
• Protect your sender reputation: identify and remove high-risk emails that can damage your sender reputation.