[imp] Reporting ham and filtering with custom headers

[Bhavin Modi]

Hi all,

I want to use the "spam reporting" feature in imp, but I am not able to
find(if it exists) a "not spam" reporting option like yahoo.

There will be lots of false positives so is there a way where I can provide
a "not spam" hyperlink which will submit email to another email address
which will identify mails as HAM.

Is it possible to filter emails based on custom headers ? For e.g
X-Spam-Flag: YES

Thanks for your help,

Regards,
Bhavin.