20 dollars for a program which requires a lot of work to get it running? The only reason I would consider buying this (for a much lower price, 6 dollars max.) would be if it gives me the ability to delete mail directly from the server. This feature is not mentioned in the documentation.

I have not and will not use this application. I understand that many applications need administrative access in order to run properly, and I have several running (including Little Snitch, which has installs its own kernel module.)

However, I refuse to use a program that does not explain WHY it needs that level of permission and what it will do to my system once that authentication's been given.

This appears on the surface to be a normal, user-level application. Other mail notification programs do not need this level of permission and I find it hard to understand how the developer could justify this.