show the number of unread mail in i3bar

i3wm/.config/i3status/config

@@ -22,6 +22,7 @@ order += "battery all"
 order += "volume master"
 order += "load"
 order += "cpu_usage"
+order += "read_file unreadmail"
 order += "tztime local"
 
 wireless _first_ {
@@ -70,3 +71,9 @@ disk "/" {
 disk "/home" {
         format = "  %avail (%percentage_avail)"
 }
+
+read_file unreadmail {
+    path = "/home/bca/.cache/mail/waarp.unreadcount"
+    format = "  %content"
+    Max_characters = 10
+}