Category: postfix

Proxmox Notification Email Error

Proxmox Notification Email Error

Proxmox is using postfix as email software, and the configuration of sender email uses local hostname+domain name as below in /etc/postfix/

myhostname=full qualified hostname


The postfix tries to look for email receiver's email server, and send emails directly to the email server using myhostname defined in /etc/postfix/ as senders DNS name. But the server hostname normally isn't using the public valid domain name, which causes email server rejects notification emails.


Change the default myhostname in /etc/postfix/ to a valid public email domain name.