Fourthly, it is a responsive medium. If you ask for feedback, be ready to respond. Dialogue and conversations you can use to build trust and momentum for the vision of the new start. If you give someone the address to your web site, a person has to take the initiative to go there. Additionally, it takes more time to set up and maintain a site.
Email is push.
You might want to use the email to drive folks to your site to see schedules more news, directions but if you send email, you know they have the basics. If you do have a web site, make sure it has a way for outsiders to subscribe to the regular email. Something those recipients would forward to their friends. The email you send should have a tone and information that recipients would want to forward to friends. If I were starting a church I would make it a tone and subject matter that the recipient could relate to.