Hi @SBDGrowth,
There are different types of preview links and it sounds like you copied the one that requires an account in your HubSpot portal. Did you copy the link from the address bar after clicking “View email”?
For a shareable link, in the email editor click Actions > Preview > Copy shareable link. That link should look something like this: hs-sites.com/-temporary-slug As you can see, it’s a temporary link and not meant for permanent sharing on social media.
A permanent web version of your marketing email is a feature limited to Marketing Hub Professional and Enterprise, see here: Create versions of marketing emails that are viewed in browser
Hope this helps!