The modes that can be set by a user require sending an email to
email@example.com. The modes themselves are set by writing
the appropriate commands in the subject header 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 writing 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 you to stop
receiving individual messages as they are posted to the list and instead
receive one email a day 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, substitute digest for digest2 in the command.
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 change
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.