diff --git a/roles/server/tasks/utilities/mail_transfer_agent.yml b/roles/server/tasks/utilities/mail_transfer_agent.yml
index a602145..276f880 100644
--- a/roles/server/tasks/utilities/mail_transfer_agent.yml
+++ b/roles/server/tasks/utilities/mail_transfer_agent.yml
@@ -24,4 +24,4 @@
         - { regex: "^mailhub=.*", line: "mailhub=mail.universe.local"}
         - { regex: "^hostname=.*", line: "hostname={{ ansible_fqdn }}"}
       when: ansible_distribution in ["Debian", "Pop!_OS", "Ubuntu", "Linux Mint"]
-  when: postfix is not defined or postfix == false
+  when: postfix is not defined or postfix == false and not (is_proxmox is defined and is_proxmox == true)