If you need help with installing or using Cumulus please post a message in the support forum.
Your question may already be answered in the FAQ.
If you are having problems registering or logging in to the forum, etc email the forum admin at email@example.com
For general, non-support comments and enquiries, email me at firstname.lastname@example.org
Please note that I cannot do personal technical support by email. Using the forum makes it much easier for me to keep track of queries. Support queries sent by email will, I am afraid, be ignored without reply.