firstname.lastname@example.org - all current local ICS members and associate members
email@example.com - former members of the ICS (or ITP)
firstname.lastname@example.org - all astro people at the ICS and Physics Institute
email@example.com - all PhD students at the ICS
NOTE: The old mailing lists (firstname.lastname@example.org, email@example.com and firstname.lastname@example.org) are all just aliases for email@example.com.