Institute of Physics - Email Discussion Lists - Descriptions of and instructions how to subscribe to IOP lists: Physics Early Professional Development (PEPD), Physics Teaching News and Comment (PTNC), Scottish Physics Teaching News and Comment (SPUTNIK), Northern Ireland Physics Teachers Group (NIPTG), Connecting Advancing Physics Teachers (CAPT), Advancing Physics Technicians (APTech), and Connecting Advancing Physics Students (CAPS).
Physhare - An unmoderated listserv dedicated to precollege physics education. Archives since 1991 are searchable.
PHYS-L - Email list for physics educators with about 700 members and typically 5-50 messages per day. Online archives (for posts since 1996) and membership interface available.
TAP-L and PIRA - Frequently asked questions regarding the physics demonstration-related listserv TAP-L (Teaching APparatus) and the affiliated organization called PIRA (Physics Instructional Resource Organization).
