Will marketo send to duplicate email addresses?

[Anonymous]

Our database currently has many leads who are also contacts. I need to send out an email to leads and contacts and therefore there are many duplicates on the list. Will Marketo automatically send each duplicate only one email?

Thanks

[Anonymous]

Marketo will send the message to one email address only when duplicate exists.
It normally selects the one having the most recent update date.

[Anonymous]

The same principle applies to form fill outs: you have a duplicate lead in your database and that lead fills out a form on your website. Marketo always updates the lead record that was most recently updated.