After delivering all the feeds to Maildirs by rssdrop, I also need a notification daemon in my byobu shell.
Byobu supports custom script and display the outputs in the bottom bar. And particularly, you can use colors in byobu script’s output!
Here is my notification script at
~/.byobu/bin/5_mail. 5 means checking every 5 seconds. Byobu will force all the scripts those period is shorter than 5 seconds to run as 5.