You can connect to any homeserver with the default client; it's not tied to the default homeserver.
If I understand puringpanda's question, the idea is that your domain and your homeserver are seized, but you have contacts on other homeservers. At this point, it's just like losing your email server. You lose your existing ID, and probably your message history, but you can reach your contacts from a new ID you create someplace else.
If I understand puringpanda's question, the idea is that your domain and your homeserver are seized, but you have contacts on other homeservers. At this point, it's just like losing your email server. You lose your existing ID, and probably your message history, but you can reach your contacts from a new ID you create someplace else.