De-Duplicate email while execution

[Anonymous]

Hi,

Wondering if someone has a database with thousands of duplicate emails (sometimes, intentional) and do not want to merge them (of course not mannually) but when having an email blast, can Marketo just send one email to the duplicate email addresses? Currently it sends 2 if one is lead and one is contact! 

It would help! or is there any way already?

Thanks,
Syed

[Jason_Scott]

I was under the impression Marketo only sent one email if there was dups.  You're saying if I have a dup and one is a contact and one is a lead it will send twice?

[Anonymous]

The engagement program will not allow two leads with the same email address to enter the program, and there is another de-dupe at the Stream level.   If you are seeing this issue in the engagement program, this is a bug.  Could you please contact support?