The project has five mail lists, currently run by a mailman software robot. There are long descriptions, archives etc. for each list on the list page which you can get to via the links below:
The old list is currently archived
over at:
http://www.sandelman.ottawa.on.ca/linux-ipsec/
There is a searchable index of the old list over at:
o http://www.nexial.com/cgi-bin/lipsec