Issue with sending email

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Hi, i have setup a roundcube account with an additional identity. The mail is sent to the identity account and by some rules, the personal account recieves the email. We reply the email with the identity account but on the personal email i recieve a copy of the whole thread in inbox.
Is there any way that you can reply the email and the personal accound doesnt recieve any kind of copy in the inbox?

Thanks so much