Remove send_only_mailserver role, since its not needed anymore
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julian
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# Role `send_only_mail_server`
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Makes sure a send-only mail server is deployed using OpenSMTPD and Rspamd for DKIM signing.
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Make sure to manually set a DMARC record and MX record for the mail domains.
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## Supported Distributions
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The following distributions are supported:
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- Debian 11
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## Required Arguments
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For the required arguments look at the [`argument_specs.yaml`](./meta/argument_specs.yml)
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Also make sure to set the following for the `cert` role dependency:
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- `cert__acme_account_email`
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## Updates
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This role doesn't handle updates.
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However it uses the system package manager for installing all the packages, so when you're making sure the system packages are up-to-date, you're handling updates for the packages installed by this role as well.
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## `hosts`
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The `hosts` for this role need to be the machines on which you want to deploy a mail server.
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## Links & Resources
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- <https://www.opensmtpd.org/>
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- <https://www.opensmtpd.org/manual.html>
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- <https://www.rspamd.com/>
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- <https://poolp.org/posts/2019-09-14/setting-up-a-mail-server-with-opensmtpd-dovecot-and-rspamd/>
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dkim_signing {
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id = "dkim_signing";
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apply {
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symbols_enabled = ["DKIM_SIGNED"];
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flags = ["skip_process"]; # Disable expensive MIME processing
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}
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}
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@ -1,11 +0,0 @@
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- name: Restart `opensmtpd.service`
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ansible.builtin.systemd:
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name: opensmtpd.service
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state: restarted
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become: true
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- name: Restart `rspamd.service`
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ansible.builtin.systemd:
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name: rspamd.service
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state: restarted
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become: true
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@ -1,31 +0,0 @@
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argument_specs:
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main:
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options:
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send_only_mail_server__mail_server_fqdn:
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description: The FQDN of the mail server host itself.
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type: str
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required: true
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send_only_mail_server__mail_server_fqdn_zone:
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description: >
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The DNS zone on the BIND 9 server for records for the mail server host
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FQDN.
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type: str
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required: true
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send_only_mail_server__mail_domains:
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description: The domains the mail server should send mails for.
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type: list
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elements: dict
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required: true
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options:
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name:
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description: The domain name.
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type: str
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required: true
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zone:
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description: The DNS zone on the BIND 9 server.
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type: str
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required: true
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send_only_mail_server__bind_9_host:
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description: The machine running BIND 9 to deploy DNS records via.
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type: str
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required: true
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dependencies: # noqa meta-no-info
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- role: distribution_check
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vars:
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distribution_check__distribution_support_spec:
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- name: Debian
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major_versions:
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- "11"
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- name: make sure DKIM private key exists
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community.crypto.openssl_privatekey:
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path: "/etc/mail-dkim/{{ item.name }}.key"
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size: 1024
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type: RSA
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owner: "root"
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group: "_rspamd"
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mode: "0640"
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become: true
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notify: Restart `rspamd.service`
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- name: make sure DKIM public key exists
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community.crypto.openssl_publickey:
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path: "/etc/mail-dkim/{{ item.name }}.pub"
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privatekey_path: "/etc/mail-dkim/{{ item.name }}.key"
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return_content: true
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become: true
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notify: Restart `rspamd.service`
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register: send_only_mail_server__dkim_public_key
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- name: deploy DKIM public key DNS entry # noqa: no-handler
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delegate_to: "{{ send_only_mail_server__bind_9_host }}"
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when: send_only_mail_server__dkim_public_key.changed
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block:
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- name: Add file containing nsupdate commands for removing DKIM public key TXT records
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ansible.builtin.template:
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src: nsupdate_delete_dkim_public_key_txt_records.j2
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dest: /root/nsupdate_delete_dkim_public_key_txt_records
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owner: root
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group: root
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mode: "0600"
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- name: Remove DNS records from BIND 9 server via nsupdate # noqa: no-changed-when
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ansible.builtin.command: /usr/bin/nsupdate -l /root/nsupdate_delete_dkim_public_key_txt_records
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- name: Add file containing nsupdate commands for adding DKIM public key TXT record
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ansible.builtin.template:
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src: nsupdate_add_dkim_public_key_txt_record.j2
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dest: /root/nsupdate_add_dkim_public_key_txt_record
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owner: root
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group: root
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mode: "0600"
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- name: Add DNS record to BIND 9 server via nsupdate # noqa: no-changed-when
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ansible.builtin.command: /usr/bin/nsupdate -l /root/nsupdate_add_dkim_public_key_txt_record
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always:
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- name: Remove file containing nsupdate commands for removing DKIM public key TXT records again
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ansible.builtin.file:
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path: /root/nsupdate_delete_dkim_public_key_txt_records
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state: absent
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- name: Remove file containing nsupdate commands for adding DKIM public key TXT record again
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ansible.builtin.file:
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path: /root/nsupdate_add_dkim_public_key_txt_record
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state: absent
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- name: make sure packages are installed
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ansible.builtin.apt:
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name:
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- opensmtpd
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- rspamd
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- opensmtpd-filter-rspamd
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become: true
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- name: make sure certificates exist
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ansible.builtin.include_role:
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name: cert
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vars:
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cert__domains:
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- "{{ send_only_mail_server__mail_server_fqdn }}"
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cert__owner: root
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cert__group: opensmtpd
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cert__bind_9_zone: "{{ send_only_mail_server__mail_server_fqdn_zone }}"
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cert__bind_9_host: "{{ send_only_mail_server__bind_9_host }}"
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cert__privkey_pem_permissions: "0640"
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cert__fullchain_pem_permissions: "0640"
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cert__chain_pem_permissions: "0640"
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cert__cert_pem_permissions: "0640"
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- name: make sure the OpenSMTPD config is deployed
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ansible.builtin.template:
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src: etc_smtpd.conf.j2
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dest: /etc/smtpd.conf
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owner: root
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group: root
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mode: "0600"
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become: true
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notify: Restart `opensmtpd.service`
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- name: make sure `/etc/mail-dkim` directory exists
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ansible.builtin.file:
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path: /etc/mail-dkim
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state: directory
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owner: root
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group: root
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mode: "755"
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become: true
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- name: make sure DKIM keypairs for all domains exist
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loop: "{{ send_only_mail_server__mail_domains }}"
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ansible.builtin.include_tasks: ensure_dkim_keypair.yaml
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- name: make sure the Rspamd `dkim_signing.conf` is deployed
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ansible.builtin.template:
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src: etc_rspamd_dkim_signing.conf.j2
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dest: /etc/rspamd/local.d/dkim_signing.conf
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owner: root
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group: root
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mode: "0644"
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become: true
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notify: Restart `rspamd.service`
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- name: make sure the Rspamd `settings.conf` is deployed
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ansible.builtin.copy:
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src: etc_rspamd_settings.conf
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dest: /etc/rspamd/local.d/settings.conf
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owner: root
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group: root
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mode: "0644"
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become: true
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notify: Restart `rspamd.service`
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allow_username_mismatch = true;
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use_esld = false;
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domain {
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{% for mail_domain in send_only_mail_server__mail_domains %}
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{{ mail_domain.name }} {
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path = "/etc/mail-dkim/{{ mail_domain.name }}.key";
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selector = "key";
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}
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{% endfor %}
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}
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@ -1,15 +0,0 @@
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# Managed by Ansible.
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# This configuration enables sending emails using this server, but to not receiving any.
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pki {{ send_only_mail_server__mail_server_fqdn }} cert "/etc/ansible_certs/certs/{{ send_only_mail_server__mail_server_fqdn }}/fullchain.pem"
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pki {{ send_only_mail_server__mail_server_fqdn }} key "/etc/ansible_certs/certs/{{ send_only_mail_server__mail_server_fqdn }}/privkey.pem"
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filter "rspamd-dkim-signing" proc-exec "filter-rspamd -settings-id dkim_signing"
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listen on lo
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listen on eth0 smtps pki {{ send_only_mail_server__mail_server_fqdn }} auth filter "rspamd-dkim-signing"
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listen on eth0 tls-require pki {{ send_only_mail_server__mail_server_fqdn }} auth filter "rspamd-dkim-signing"
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action "outbound" relay helo {{ send_only_mail_server__mail_server_fqdn }}
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match from any auth for any action "outbound"
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debug
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zone {{ item.zone }}
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update add key._domainkey.{{ item.name }} 60 TXT v=DKIM1;k=rsa;p={{ send_only_mail_server__dkim_public_key.publickey | replace('\n', '') | replace('-----BEGIN PUBLIC KEY-----', '') | replace('-----END PUBLIC KEY-----', '') }}
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send
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debug
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zone {{ item.zone }}
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update delete key._domainkey.{{ item.name }} TXT
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send
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