diff --git a/microsoft-email-servers.txt b/microsoft-email-servers.txt
new file mode 100644
index 0000000..8ddc75f
--- /dev/null
+++ b/microsoft-email-servers.txt
@@ -0,0 +1,6 @@
+40.92.0.0/15
+40.107.0.0/16
+52.100.0.0/14
+104.47.0.0/17
+2a01:111:f400::/48
+2a01:111:f403::/48