Can I chat with people who aren’t on illumy yet?
Absolutely! When you send a message from illumy to somebody’s non-illumy email address, your friends and family will receive it as an email in their inbox. You can even add a non-illumy email address to a group chat. They’ll get the messages as emails, and when they reply to those emails, you (and everyone in the chat) will see their replies inline, in the chat conversation.