An Ansible role to install Postfix and configure as send-only via an SMTP relay.
This role is designed to be used on a server that will only send emails and not receive them. This is useful for recieving emails from cron jobs or other services/applications that want to send emails from a server.
A SMTP relay service is required.
Your email provider may offer a SMTP relay service. If not, there are several popular SMTP relays that offer free tiers (others are also available).
| Service | Free Tier Email Limit | Docs |
|---|---|---|
| Mailjet | 6000 per month, 200 per day | link |
| Sendgrid | 3000 per month, 100 per day | link |
- AlmaLinux >= 8
- AmazonLinux 2023
- CentOS >= 7
- Debian >= 10
- Fedora >= 37
- openSUSE >= 15.4
- OracleLinux >= 8
- Pop!_OS >= 18.04
- Redhat Enterprise Linux >= 8
- Rocky Linux >= 8
- Ubuntu >= 18.04
---
# Config path for postfix
postfix_config_file: "/etc/postfix/main.cf"
# The domain that is used to send emails.
postfix_mydomain:
# The domain that is used to send emails if no domain is specified. This is usually the same as mydomain or myhostname
postfix_myorigin: "$mydomain"
# mydestination controls a list of domains that postfix considers itself the final destination for.
## When aliases are set, postfix needs to "proccess" the email to then forward it on using /etc/aliases.
## example: root -> postfix -> root@example.com - > aliases -> fobar@outlook.com -> relayhost -> foobar@outlook.com
postfix_mydestination: "$myhostname, localhost.$mydomain, localhost, $mydomain"
## When aliases are not required localhost only entry will forward on all emails without any "processing" from postfix.
## example: root -> postfix -> root@example.com -> relayhost -> root@example.com
# postfix_mydestination: "localhost"
# interfaces that can send emails - loopback-only allowes only localhost to send.
postfix_inet_interfaces: "loopback-only"
# The relay host of SMTP server.
postfix_relayhost:
# Username for SMTP server.
postfix_sasl_username:
# Password for SMTP server.
postfix_sasl_password:
# The domain that the mail command will use.
postfix_mail_send_domain: "{{ postfix_mydomain }}"
# Email address alias that will recieve all emails sent to the servers root user.
postfix_root_alias:
# Email address to recieve test email when role is run.
postfix_test_send_email:community.general---
- name: Linux Admin Packages
hosts: all
vars:
postfix_mydomain: "example.com"
postfix_relayhost: "[in-v3.mailjet.com]:587"
postfix_sasl_username: "username"
postfix_sasl_password: "password"
postfix_root_alias: "foobar@outlook.com"
roles:
- role: "dgibbs64.postfix_send_only_relay"MIT
