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GitHub User: voodoologic
if you find that you have rails 3 gems conflicting with your script/generate daemon mailer...
error like: http://pastie.org/1736483
Then this version of the plugin will work for you: https://github.com/jmazzi/daemon_generator
You can also solve the problem by implementing bundler into your rails 2.3.X application:
I got it working using the first technique and didn't bother to try the second. happy coding!