can't be amused by the spelling of his name. Getting to the point. People are busy; they don't have time to read long emails. Your client or buy email database colleague wants to know what an email is all about as soon as possible. Do not add fluff or information that is not necessary. Properly use blind copy (BCC) and courtesy copy (CC). CCI should only be done for convenience.
When sending out a mass email distribution list so that customers or colleagues don't have to see a long list of names (and people who don't want to not have their email shared will be protected). Use CC when sending copies to