The HubSpot single send & transactional emails feature allows us to send a custom 1:1 email to a customer from hubspot

Build out the look and feel and any non-variable text into the email as you normally would, then:

• Choose Actions → Convert to Single Send API

More from hubspot docs here:

Send transactional emails

👉 Click Here to see a list of the properties available to use in hubspot emails

Example:

Let's assume you wanted to use a website name in an email, you would type the following in the email:

Hello there! This is an email about the website {{custom.website_name}}!

Here's what hubspot would send for Acme Dealer

Hello there! This is an email about the website Acme Dealer!