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For example to subscribe to the users mailing list you would send an e-mail to users-subscribe@netbeans.incubator.apache.org.
Unsubscribe
Send an e-mail to <shortname>-unsubscribe@netbeans.incubator.apache.org.
For example to unsubscribe from the users mailing list you would send an e-mail to users-unsubscribe@netbeans.incubator.apache.org.
DO NOT SEND UNSUBSCRIBE MESSAGE DIRECTLY TO THE LIST ITSELF.
Please, do not send unsubscribe messages directly to the list itself.
By far the most common unsubscription problem is attempting to unsubscribe from an address that is not subscribed, perhaps because it is different to the one originally subscribed. If you're not sure which of your email addresses is subscribed, you can find out by examining the headers of a list message.
Digest Subscriptions
The mailing lists can also be subscribed to in digest form, so that you at most receive one e-mail per day.
To subscribe in digest form, send e-mail to <shortname>-digest-subscribe@netbeans.incubator.apache.org, e.g. to users-digest-subscribe@netbeans.incubator.apache.org. Similarly, if you want to unsubscribe from the daily digest, you would send an e-mail to <shortname>-digest-unsubscribe@netbeans.incubator.apache.org.
Technology
In general, mailing lists for Apache projects - and Apache NetBeans is no exception - are managed by ezmlm.