Using only Hubspot or Hubspot and Mailerlite?

Hey,

I sync my users with Hubspot, but I also have access to Mailerlite. So I use Hubspot more like CRM but I'm open to ideas.

I'd like to send daily notifications, some updates from time to time about product to their emails.

Should I do this inside Hubspot or do email notifications only in Mailerlite?

Why, why not?