Hi @Matt Fripp8 That is possible. But you will have to check the website provider if they accept embedding a form from Convertkit.
If it's possible with he website, you can add a Convertkit form tot he website > Collect the subscriber email from the website > have your mailing list within Converkit> use that list to send out personalized emails.
Convertkit gives an option to customize their template based forms and emails.
I hope it helps. If you're still having issues or need further assistance you can always reach out to firstname.lastname@example.org.