Hello @DavidP3141 ,
If you've received permission from an institution or individual to send an email to a specific address, then you can upload that address as a contact into your account to send to.
For more info:
Our privacy policies
Our email permissions policies
Implied vs. Expressed Permissions under CASL and GDPR
Organically growing contacts with permissions
Enabling Confirm Opt-In for emailing
... View more