The problem with email listserves of associations

GEOSAGE sits down to work... I will promote Geography using cartoons and comics.
Yay! I will start with issue 2012 vol1 no1
Comic strip emailed to CAGLIST...
Oh no! The CAGLIST rejected my post again. ... Because I am not a member!!
GEOSAGE thinks deeply... Are CAGLIST members being fed a controlled information diet?
Maybe I should change my focus from promotion to critique!
I guess that's how negative experiences change one's focus!
Notes:
CAG - Canadian Association of Geographers.
CAGLIST - Official email listserve of the CAG.

Thoughts? Share your comments below.