Importing exim4 role to better personalize it.

roles/exim4/LICENSE.txt

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+MIT License
+
+Copyright (c) 2016 Tobias Schifftner, ambimax® GmbH
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

roles/exim4/defaults/main.yml

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+---
+exim4_sendonly_fqdn: '{{ ansible_fqdn }}'
+
+exim4_sendonly_enable_tls: true
+exim4_sendonly_smarthost: ''
+exim4_sendonly_username: ''
+exim4_sendonly_password: ''
+
+exim4_sendonly_email_addresses: []
+#  root: 'your@email.com'
+
+exim4_sendonly_email_aliases: []
+#  - regexp: '^root:'
+#    line: 'root: your@email.com'
+
+exim4_sendonly_apt_packages:
+  - exim4-daemon-light
+  - mailutils

roles/exim4/handlers/main.yml

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+---
+- name: restart exim4
+  service:
+    name: 'exim4'
+    state: restarted
+    enabled: yes

roles/exim4/tasks/configure.yml

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+---
+
+- name: Configure exim4
+  notify: restart exim4
+  template:
+    src: 'update-exim4.conf.conf'
+    dest: /etc/exim4/update-exim4.conf.conf
+
+- name: Update mailname
+  notify: restart exim4
+  copy:
+    content: '{{ exim4_sendonly_fqdn }}'
+    dest: '/etc/mailname'
+
+- name: Define email aliases
+  notify: restart exim4
+  lineinfile:
+    dest: /etc/aliases
+    regexp: "{{ item.regexp }}"
+    line: "{{ item.line }}"
+  with_items: '{{ exim4_sendonly_email_aliases }}'
+  when: exim4_sendonly_email_aliases|length
+
+- name: Define email addresses
+  notify: restart exim4
+  template:
+    src: 'email-addresses.j2'
+    dest: '/etc/email-addresses'
+  when: exim4_sendonly_email_addresses|length
+
+- name: Set auth for relay host
+  notify: restart exim4
+  template:
+    src: 'passwd.client'
+    dest: '/etc/exim4/passwd.client'
+
+- name: Enable TLS
+  notify: restart exim4
+  template:
+    src: 'exim4.conf.localmacros'
+    dest: '/etc/exim4/exim4.conf.localmacros'
+  when: exim4_sendonly_enable_tls

roles/exim4/tasks/install.yml

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+---
+- name: Install exim4 packages
+  apt:
+    name: '{{ exim4_sendonly_apt_packages }}'
+    state: present
+    cache_valid_time: 86400

roles/exim4/tasks/main.yml

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+---
+
+- name: Install exim4
+  include: install.yml
+  tags: ['exim4-sendonly-install']
+
+- name: Configure exim4
+  include: configure.yml
+  tags: ['exim4-sendonly-configure']
+
+- name: Start exim4
+  service:
+    name: exim4
+    state: started
+    enabled: true
+  changed_when: false
+  tags: ['always']

roles/exim4/templates/email-addresses.j2

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+{% for user, email in exim4_sendonly_email_addresses.items() %}
+{{ user }}: {{ email }}
+{% endfor %}

roles/exim4/templates/exim4.conf.localmacros

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+MAIN_TLS_ENABLE = 1

roles/exim4/templates/passwd.client

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+# password file used when the local exim is authenticating to a remote
+# host as a client.
+#
+# see exim4_passwd_client(5) for more documentation
+#
+# Example:
+### target.mail.server.example:login:password
+{% if exim4_sendonly_username != '' %}
+*:{{ exim4_sendonly_username }}:{{ exim4_sendonly_password }}
+{% endif %}

roles/exim4/templates/update-exim4.conf.conf

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+# /etc/exim4/update-exim4.conf.conf
+#
+# Edit this file and /etc/mailname by hand and execute update-exim4.conf
+# yourself or use 'dpkg-reconfigure exim4-config'
+#
+# Please note that this is _not_ a dpkg-conffile and that automatic changes
+# to this file might happen. The code handling this will honor your local
+# changes, so this is usually fine, but will break local schemes that mess
+# around with multiple versions of the file.
+#
+# update-exim4.conf uses this file to determine variable values to generate
+# exim configuration macros for the configuration file.
+#
+# Most settings found in here do have corresponding questions in the
+# Debconf configuration, but not all of them.
+#
+# This is a Debian specific file
+dc_eximconfig_configtype="{{ 'internet' if exim4_sendonly_smarthost == '' else 'satellite' }}"
+dc_other_hostnames='{{ ansible_hostname }}; localhost.localdomain; localhost'
+dc_local_interfaces='127.0.0.1'
+dc_readhost=''
+dc_relay_domains=''
+dc_minimaldns='false'
+dc_relay_nets=''
+dc_smarthost='{{ exim4_sendonly_smarthost }}'
+CFILEMODE='644'
+dc_use_split_config='true'
+dc_hide_mailname='true'
+dc_mailname_in_oh='true'
+dc_localdelivery='mail_spool'