Hello @user9131287 ,
By "blacklisting," are you asking about unsubscribes / spam reports, or something else? If you're sending emails for a particular organization / company, then you'll want to be sending those emails through an address associated with the company. That said, depending on the organization, you may want to look into self-authenticating your domain, to avoid your emails getting erroneously flagged as not being sent by you.
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