diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index d00cc09..b865ebd 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -81,11 +81,11 @@ resources:
    - container: greenmail
      image: greenmail/standalone:1.5.9
      ports:
-       - 3025
-       - 3110
-       - 3143
-       - 3465
-       - 3993
-       - 3995
+       - 3025:3025
+       - 3110:3110
+       - 3143:3143
+       - 3465:3465
+       - 3993:3993
+       - 3995:3995
      env:
        GREENMAIL_OPTS: "-Dgreenmail.setup.test.all -Dgreenmail.hostname=0.0.0.0 -Dgreenmail.auth.disabled -Dgreenmail.verbose"