To subscribe to or unsubscribe from a PlanetLab mailing list, use the Mailman interface. The following is a list of the most active and relevant mailing lists that all users should join.
Announcements
All active users are automatically subscribed to these mailing lists.
General Mailing Lists
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users@lists.planet-lab.org:
Used by the PlanetLab community to exchange information about using PlanetLab; discussion topics   are varied but could include "How do I do X in PlanetLab?"
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devel@lists.planet-lab.org:
Used by the PlanetLab community to discuss development issues for the core PlanetLab system. Developers interested in implementation and design discussions, especially related to MyPLC, should join this list.