Vulcan/packages/_nova-invites/lib/server/templates/emailInvite.handlebars

<span class="heading">
  <a href="{{profileUrl}}">{{invitedBy}}</a> invited you to join {{communityName}}
</span><br><br>

{{#if newUser}}
  <a href="{{siteUrl}}{{actionLink}}">Join {{communityName}}</a>
{{else}}
  <a href="{{siteUrl}}{{actionLink}}">Sign in to {{communityName}}</a>
{{/if}}

<br><br>