Set up reverse DNS for your VPS · Galaxium Hosting help

Point your server's IPv4 address back to a name, which mail servers check before accepting your email.

Reverse DNS (a PTR record) maps your server's IPv4 address back to a name, for example mail.example.com. Mail servers often check it before they accept email from your server. Most other uses don't need it.

Before you start

• You need a domain you control.
• Point the name at your server first: add an A record for it with your server's IPv4 address. If the domain is with us, see Manage DNS records, nameservers and forwarding.
• The server must be active (not suspended or still being set up).

Set reverse DNS

• Open your server from My services and go to Settings.
• Find the Reverse DNS (PTR) row.
• Type the full name, for example mail.example.com.
• Click Save.

The Overview shows the current value under More details → Reverse DNS. Changes can take a while to reach other networks.

Go back to the default

Clear the box and click Reset. Reverse DNS goes back to your server's hostname (the one shown as Server hostname on the Overview).

If the row isn't there

Not every server type supports changing reverse DNS from the panel. If Settings has no Reverse DNS (PTR) row, open a support ticket with the IP address and the name you want.

Troubleshooting

• "A PTR record must be a fully-qualified domain name": enter the whole name, such as mail.example.com, not just mail.
• Mail is still rejected: reverse DNS is only one check. Also set up SPF, DKIM and DMARC for your domain, and make sure the name's A record points to the same IP.