The subscription system has been expanded to allow subscribers to add themselves to or remove themselves from your subscriber list by simply sending an empty email message to a particular email address. The general format for these addresses is as follows:

Add to the list:
subscribe@[accountname].imakenews.net
join@[accountname].imakenews.net

Remove from the list:
unsubscribe@[accountname].imakenews.net
leave@[accountname].imakenews.net

This feature can be enabled and disabled from the Subscription
Builder.