Hosting without DNS records

Note

This option is experimental and might change without notice.

In case you don’t have a domain, for example in a local network, you can run a chatmail relay with only an IPv4 address as well.

To deploy a relay without a domain, run cmdeploy init with only the IPv4 address during the installation steps, for example cmdeploy init 13.12.23.42.

Drawbacks

• your transport encryption will only use self-signed TLS certificates, which are vulnerable against MITM attacks. the chatmail core’s end-to-end encryption should suffice in most scenarios though.

• your messages will not be DKIM-signed; experimentally, most chatmail relays accept non-DKIM-signed messages from IPv4-only relays, but some relays might not accept messages from yours.