How to send email through active campaign?

We are planning to send an email to our customer reading from a csv file. This is an important letter informing about debt, so it need to be stored in email server so that we could print them later. Our requirement, saying we have to send those emails through Zendesk or ActiveCampaign. Seems that Zendesk does not allow initiating outbound emails. So, option ActiveCampaign is now exist. I am new in ActiveCampaign. I couldn't see such option in ActiveCampaign to send dynamic context to each email. Do you know such feature in ActiveCampaign? Or you may also suggest me any other better option.