diff --git a/mailgun/sendmail b/mailgun/sendmail
index 1b27963..b979fed 100755
--- a/mailgun/sendmail
+++ b/mailgun/sendmail
@@ -1,6 +1,7 @@
 #!/bin/bash
 set -e
 set -o pipefail
+set -x
 
 if [[ -z "$MAILGUN_API_KEY" ]]; then
 	echo "Set the MAILGUN_API_KEY env variable."