Re: Recommendation for Data cleansing tool in Marketo
I use NetProspex and have had a great experience. Their customer support is fantastic and they do a lot to get new users up and going. They have a Marketo Connector which appends data in real-time when they fill out a form on your site. They'll be able to tell you which of your emails are deliverable and which are threat risks. Click here for a free health scan to see which data they can append to your existing database.