Change Hostname

This page explains how to change the server's hostname in GoAdmio. The hostname is the server's own name on the network — used in mail headers, SSL certificates for system services, logs, and the panel banner.

Location: Admin Panel → Networking Setup → Change Hostname

Overview

Every GoAdmio server has a fully qualified domain name (FQDN) as its hostname — for example, mail.gopanel.org, server1.example.com, or srv01.yourdomain.com. The hostname appears in:

The panel header (top bar)
Mail server HELO/EHLO and headers (e.g., Received: lines)
System service SSL certificate (panel, mail, FTP)
System logs
DNS PTR records (reverse DNS)
/etc/hostname and INLINECODE5

A properly configured hostname is important for email deliverability: receivers check that your server identifies itself with a valid FQDN that resolves forward and backward.

> Warning: Changing the hostname is a server-wide change. It can break email, SSL certificates, and DNS if the new hostname is not already configured correctly. Plan the change carefully, and do it during a maintenance window if the server is in production.

Prerequisites

Before changing the hostname, make sure:

The new hostname is a valid FQDN in a domain you control — e.g., server1.example.com, not server1 or server1.local.
An A record exists for the new hostname, pointing to the server's public IPv4 address.
An AAAA record exists (if the server has IPv6) pointing to the server's IPv6 address.
A PTR (reverse DNS) record at your hosting provider points from the server IP back to the new hostname.
The domain is not already used by a hosting account on the server — the hostname must be a server-level name, not a customer's primary domain.
You have a current backup or snapshot of the server.

> Tip: Verify DNS resolution for the new hostname before changing anything: ```bash dig +short server1.example.com host server1.example.com