diff --git a/cluster/prod/app/email/deploy/email.hcl b/cluster/prod/app/email/deploy/email.hcl
index 79eb526..6fa1e67 100644
--- a/cluster/prod/app/email/deploy/email.hcl
+++ b/cluster/prod/app/email/deploy/email.hcl
@@ -253,7 +253,7 @@ job "email" {
     task "server" {
       driver = "docker"
       config {
-        image = "superboum/amd64_postfix:v3"
+        image = "superboum/amd64_postfix:v4"
         readonly_rootfs = false
         network_mode = "host"
         ports = [ "smtp_port", "smtps_port", "submission_port" ]