I put this in the list configuration page as explained.

 Renewal= 6-monthly, delay (14) 
 Then I get this error message when I submit it.

 I also tried 7 as a delay value,, same result.

 Renewal- 6-monthly, delay (7)

 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  The following problems have been detected in the list header:

* Renewal= ...,DELAY
 Error: Invalid parameter value. Please consult the list keyword documentation
 for a description of this keyword, whose syntax is too complex to
 describe here.

Please refer to the list keyword documentation (available via the "INFO
 KEYWORDS" command) for more information about keyword syntax.

PUT operation rejected, old list remains unchanged.

       From: Pete Weiss <[log in to unmask]>
 To: [log in to unmask] 
 Sent: Saturday, October 10, 2015 1:19 PM
 Subject: Re: Filtering Subscribers
   
 Do some list-owner documentation searches on CONFIRM and/or RENEWAL


 
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