Transactional email vs Operational email
I'm an ex-Marketo user, and in Marketo we had an option of making an email 'operational', which sounds similar to the 'Transactional' email in Hubspot.
However, i've only used this kind of email for sending a 'thank you, here is the download you requested' email confirmation. This is similar to a 'transactional email', in that it's not a marketing email, rather it's giving the user the requested information. They can still be unsubscribed to everything else.
So, here's my question... If i have not purchased Hubspot's additional Transactional Email Add-on, how can i send these 'operational emails' to someone who is unsubscribed, yet has filled out a form and wants an asset? (please don't answer to just give them the asset on the thank you page, as I find that using an email response helps keep down spam emails.)