Mandeep and Jim, thanks for responding.
Jim, I don't see anything in the radiant log or the webserver (nginx, in
this case) logs. The error message only appears in the browser window when
I visit the mailer form page. Is there some way to get more verbose logging
from radiant?
Mandeep, I think the link you sent would be an excellent reference for
someone programming/developing an actionmailer application, but all I'm
trying to do is use one that someone else has written. I'm not a Ruby
programmer, just someone hoping to use the radiant-mailer-extension on a
radiant site.
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marshal