mirror of
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4ebde2825d
* dovecot: enable login names with square brackets * config: make IPv4-only relays use self-signed TLS certs * postfix: make delivery for IP-only relays work * cmdeploy: skip DNS checks for IPv4 only relays * www: generate dclogin codes for IPv4-only relays * opendkim: disable DKIM signing on ipv4-only relays * get delivery working * get tests working on IPv4 only machine * doc: document IPv4-only relays * dns: warn if mail_domain is an IP, instead of checking DNS * config: validate domains when formatting them * ci: add cmlxc testing for no-DNS relays * ci: run no-dns and normal CI in parallel * retain "config.mail_domain" as the domain part of @ email addresses, so for ipv4 relays "[1.2.3.4]" and introduce config.ipv4_relay and config.mail_domain_bare helpers. * ci: migrate from --no-dns to --type ipv4 for cmlxc compatibility * cleanup dead code, fix docs, fixate cmlxc version --------- Co-authored-by: missytake <missytake@systemli.org>
41 lines
1.1 KiB
ReStructuredText
41 lines
1.1 KiB
ReStructuredText
.. _iponly:
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Hosting without DNS records
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===========================
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.. note::
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This option is experimental and might change without notice.
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In case you don't have a domain,
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for example in a local network,
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you can run a chatmail relay with only an IPv4 address as well.
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To deploy a relay without a domain,
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run ``cmdeploy init`` with only the IPv4 address
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during the :ref:`installation steps <setup>`,
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for example ``cmdeploy init 13.12.23.42``.
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Drawbacks
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---------
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- your transport encryption will only use self-signed TLS certificates,
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which are vulnerable against MITM attacks.
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the chatmail core's end-to-end encryption should suffice in most scenarios though.
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- your messages will not be DKIM-signed;
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experimentally, most chatmail relays accept non-DKIM-signed messages from IP-only relays,
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but some relays might not accept messages from yours.
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Email addresses
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---------------
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When running without a domain,
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your chatmail addresses will use the IPv4 address
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in brackets as the domain part,
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for example ``user@[13.12.23.42]``.
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This is a valid email address format
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according to :rfc:`5321`.
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