The modes that can be set by a user require to send an email to listar@linuxfromscratch.org. The modes themselves are set by writing the appropriate commands in the subject headers of the message. As the name implies, the Set command tells what to write to set a mode. The Unset command tells what to write to unset a mode. The listname in the example subject headers should be replaced with the listname to which the mode is going to be applied to. If more than one mode is to be set (to the same list or multiple lists) with one email, this can be done by leaving the subject header blank and write all the commands in the body of the message instead. Set command: set listname digest Unset command: unset listname digest All lists have the digest mode available which can be set after a user has subscribed to a list. Being in digest mode will cause to stop receiving individual messages as they are posted to the list and instead send one email daily containing all the messages posted to the list during that day. There is a second digest mode called digest2. When a user is set to this mode he will receive the daily digests but will also continue to receive the individual messages to the lists as they are posted. To set this mode digest2 has to be written instead of digest in the subject header. Set command: set listname vacation Unset command: unset listname vacation If a user is going to be away for a while or wishes to stop receiving messages from the lists but doesn't want to unsubscribe, he can set to vacation mode. This has the same effect as unsubscribing, but without having to go through the unsubscribe process and then later through the subscribe process again.