Rated 4 out of 5 stars

Από τον/την dannbohn στις Ιαν. 24, 2012 ·

would be 5 star if clicking the notification opened Thunderbird...

από τον Mitar (δημιουργός) στις Ιαν. 24, 2012 ·

growlnotify does not support this, it seems. Please write upstream. ;-)