The SIP Forum operates mailing lists for each of its working groups, as well as a general-purpose mailing list for questions about SIP.

General SIP Query Mailing List - discussion

Signup:  HERE
Send mail to: This e-mail address is being protected from spam bots, you need JavaScript enabled to view it
List archive: HERE

Marketing Working Group - marketingwg

Signup: HERE
Send mail:  This e-mail address is being protected from spam bots, you need JavaScript enabled to view it
List archive: HERE

Main Technical Working Group List (for SIPconnect 1.1 work in progress) - techwg

Signup: HERE
Send mail: This e-mail address is being protected from spam bots, you need JavaScript enabled to view it
List archive: HERE

User Agent Configuration Task Group - ua-config

Signup: HERE
Send mail: This e-mail address is being protected from spam bots, you need JavaScript enabled to view it
List archive: HERE

Fax Over IP Interoperability Task Group - foip

Signup: HERE
Send mail: This e-mail address is being protected from spam bots, you need JavaScript enabled to view it
List archive: HERE

Smart Grid Special Interest Group (SIG) - smartgrid

Signup: HERE
Send mail: This e-mail address is being protected from spam bots, you need JavaScript enabled to view it
List archive: HERE