I was set to topic ALL and I just added OTHER, but listserv came back and said:
 
>> SET WRITELAB TOPICS: +OTHER
>All the options you specified were already in effect. Here are the exact
>settings now in use for your  subscription. Please take a few moments to
>check that this is indeed what you wanted.
         No acknowledgement of successfully processed postings
 
>
>The topics you subscribe to are: All
 
So ALL does include OTHER, it seems?
 
Jilla