Disabling opt-in email for selected contacts.

[#1]

I've imported a list into HubSpot and sent out emails to the imported list. 

However, I get the following message: 

Emails to x recipients weren't sent. These recipients haven't subscribed to double opt-in emails, so this email couldn't be sent to them.

I want to disabled double opt in for these contacts so they recieve the email directly. Is this possible?

[#2]

I don't believe so. From my understanding, the way you'd accomplish this would be to disable double opt-in as a setting and then set up a custom property and a workflow to trigger an email for those contacts based on that property.