NOTE: The google groups account email@example.com is now officially deprecated in favor of the Apache-hosted user/dev mailing lists.
Storm users should send messages and subscribe to firstname.lastname@example.org.
You can also browse the archives of the storm-user mailing list.
Storm developers should send messages and subscribe to email@example.com.
You can also browse the archives of the storm-dev mailing list.
Storm developers who would want to track the JIRA issues should subscribe to firstname.lastname@example.org.
You can view the archives of the mailing list here.
If you are using a pre-built binary distribution of Storm, then chances are you should send questions, comments, storm-related announcements, etc. to email@example.com.
If you are building storm from source, developing new features, or otherwise hacking storm source code, then firstname.lastname@example.org is more appropriate.
If you are committers and/or PMCs, or contributors looking for following up and participating development of Storm, then you would want to also subscribe email@example.com in addition to firstname.lastname@example.org.
All existing messages will remain archived there, and can be accessed/searched here.
New messages sent to email@example.com will either be rejected/bounced or replied to with a message to direct the email to the appropriate Apache-hosted group.
You can also come to the #storm-user room on freenode. You can usually find a Storm developer there to help you out.