>* .ik myfilter.keywords
That shouldn't work. The syntax is simply
* .IK <filename_of_keywords_file>
ie,
* .IK MYFILTER
You aren't supposed to specify the .keywords extension, as it is assumed.
(It could be that LISTSERV simply ignores everything after the dot; I
haven't tested that, but it isn't <supposed> to work that way.)
Nathan