Strange message when running wp-mail.php

I’m not using the plain vanilla version of wp-mail.php that came with my WP1.5. I’m using Jon Blades hacked version, but since I can’t seem to post comments to his site, I’ll try my luck here. Whenever I run wp-mail.app, I get the following error on a blank browser window, and nothing posts:
#!/usr/bin/php -q Ooops POP3: premature NOOP OK, NOT an RFC 1939 Compliant server

Anyone have any idea what this means?
TIA.