Preview recipients of mass email and sending mass email to unique email addresses ONLY

Preview recipients of mass email and sending mass email to unique email addresses ONLY

Hello,

I'm trying to send a mass email to only accounts that have had a closed won deal in the last 6 months, I am not able to filter this way from the accounts module but i can from the deals module. However, on the deals module we have several deals under the same accounts. So when we filter down to closed won deals in the last 6 months, some of the accounts will appear more than once. Now on the mass email criteria i can filter down to closed won deals in the last 6 months but i cannot see who the recipients will be, therefore, cannot see if the email recipients will be duplicated or unique.

Please assist with a way to either see the recipients pulled by the criteria or a way to pull unique email addresses.

Thank you.