SMBC members can keep in touch using google groups. You can subscribe and unsubscribe at https://groups.google.com/forum/#!forum/smbc-mail. Members of the group can browse topics (and reply) from the web interface or you can get messages delived to your email address. The message submission address is smbc-mail@googlegroups.com.
Please don’t ask me for detailed instructions on how to subscribe. I don’t know. As the group creator I am already a member of the group and google doesn’t show me the same information that non-members see.