diff --git a/mutt/xdg-utils.txt b/mutt/xdg-utils.txt
new file mode 100644
index 0000000..2099f11
--- /dev/null
+++ b/mutt/xdg-utils.txt
@@ -0,0 +1,24 @@
+xdg-utils
+
+xdg-utils provides the official utilities for managing MIME types and default applications according to the #XDG standard. Most importantly, it provides /usr/bin/xdg-open which many applications use to open a file with its default application. It is desktop-environment-independent in the sense that it attempts to use each environment's native default application tool and provides its own mechanism if no known environment is detected. Examples:
+
+# determine a file's MIME type
+$ xdg-mime query filetype photo.jpeg
+image/jpeg
+
+# determine the default application for a MIME type
+$ xdg-mime query default image/jpeg
+gimp.desktop
+
+# change the default application for a MIME type
+$ xdg-mime default feh.desktop image/jpeg
+
+# open a file with its default application
+$ xdg-open photo.jpeg
+
+# shortcut to open all web MIME types with a single application
+$ xdg-settings set default-web-browser firefox.desktop
+
+# shortcut for setting the default application for a URL scheme
+$ xdg-settings set default-url-scheme-handler irc xchat.desktop
+
diff --git a/xinitrc b/xinitrc
index a61817e..8808c8f 100644
--- a/xinitrc
+++ b/xinitrc
@@ -4,4 +4,5 @@
 xsetroot -cursor_name left_ptr
 
 xbindkeys &
+slack &
 exec i3
diff --git a/zprofile b/zprofile
index 2319699..9a442d7 100644
--- a/zprofile
+++ b/zprofile
@@ -1,2 +1 @@
-gpg2 --quiet --no-tty --batch -d /home/paul/.mutt/passwords/dumb.gpg > /dev/null
-systemctl --user start offlineimap > /dev/null
+gpg2 --quiet --no-tty --batch -d $HOME/.mutt/passwords/dumb.gpg > /dev/null