emailing linkedin

I am looking to expand a service to my B2B clients where we set up and email a campaign on their behalf. These are whitehat B2B clients, so nothing spammy and send 2000 - 10000 emails or so each month per client per campaign. I would bring the clients and give you a list of linkedin profile...

Having connected with a bunch of relevant users, and gained access to their email address, how do you email them with your offer? Because surely emailing them randomly out of the blue will inevitably result in a spam violation. Alternatively using an autoresponder requires them to opt-in? How...