If you want to volunteer for DebConf, you can contact the DebConf Team mailing list: firstname.lastname@example.org. This list is used for general organization. It has open subscription and public archives.
Accommodation and Registration
All questions and inquiries regarding either accommodation or registration should be directed to the Registration Team: email@example.com
Questions and inquiries about talks and paper submissions: firstname.lastname@example.org
Send your questions and inquiries about sponsorship and becoming a sponsor: email@example.com.
Legal responsibilities regarding visa, conference invitations fall on our Visa Team firstname.lastname@example.org.
Report harassment and anything contributing to a disrespectful environment to email@example.com.