@npub1f9ll...782z yes, you can use email addresses from any modern email service that provides a certain level of security. Just make sure you use a *dedicated* address. Using email addresses that are simultanously used by non-chatmail clients are not supported, however. In prior times we tried to make it work but it detrimental to security outcomes and easily gets confusing for users. So email addresses are fine but need to be dedicated for chatting via chatmail clients.