Issue with E-mail Campaign(e-mail deduplication)

We execute E-mail campaigns

let us say i have 100 consumers in TG

We are in to utility industry

we follow one-one service(means for each consumer each business partner created in system)

1 single customer has multiple connection on his name

hence if you are consumer you will have multiple consumer accounts with same number of business partners

now same mail ID is updated in business partners

when ever i trigger E-mail campaign you will receive multiple mails as updated in BP

kindly assist

Regards

chinna