Can Hubspot automatically delete duplicate contacts of different lists when I send out an email?

[MFoundation]

Say I will send an email to contacts on different lists and there may be duplicate contacts on those lists. 

Is there any way that I can make sure each contact will receive the same email only once? Thanks for your help! 

[AnnicaThorber]

Yes, Hubspot only send the email once. I recommend that you regularly go through the duplicate tool and make sure there isn any, 

[karstenkoehler · Accepted solution]

Hi @MFoundation,

Yes, this is happening automatically. For example, if contact 1 is on list A and list B and you're adding both list and A and B in the recipients section of a marketing email, contact 1 will receive the email only once.

Best regards!