109 lines
4.7 KiB
Markdown
109 lines
4.7 KiB
Markdown
---
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layout: default
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title: SMTP
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parent: Notifier
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grand_parent: Configuration
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nav_order: 2
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---
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# SMTP
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**Authelia** can send emails to users through an SMTP server.
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It can be configured as described below.
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```yaml
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# Configuration of the notification system.
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#
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# Notifications are sent to users when they require a password reset, a u2f
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# registration or a TOTP registration.
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# Use only an available configuration: filesystem, smtp.
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notifier:
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# You can disable the notifier startup check by setting this to true.
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disable_startup_check: false
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# For testing purpose, notifications can be sent in a file
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## filesystem:
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## filename: /config/notification.txt
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# Use a SMTP server for sending notifications. Authelia uses PLAIN or LOGIN method to authenticate.
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# [Security] By default Authelia will:
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# - force all SMTP connections over TLS including unauthenticated connections
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# - use the disable_require_tls boolean value to disable this requirement (only works for unauthenticated connections)
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# - validate the SMTP server x509 certificate during the TLS handshake against the hosts trusted certificates
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# - trusted_cert option:
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# - this is a string value, that may specify the path of a PEM format cert, it is completely optional
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# - if it is not set, a blank string, or an invalid path; will still trust the host machine/containers cert store
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# - defaults to the host machine (or docker container's) trusted certificate chain for validation
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# - use the trusted_cert string value to specify the path of a PEM format public cert to trust in addition to the hosts trusted certificates
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# - use the disable_verify_cert boolean value to disable the validation (prefer the trusted_cert option as it's more secure)
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smtp:
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username: test
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# Password can also be set using a secret: https://docs.authelia.com/configuration/secrets.html
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password: password
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host: 127.0.0.1
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port: 1025
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sender: admin@example.com
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# HELO/EHLO Identifier. Some SMTP Servers may reject the default of localhost.
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identifier: localhost
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# Subject configuration of the emails sent.
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# {title} is replaced by the text from the notifier
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subject: "[Authelia] {title}"
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# This address is used during the startup check to verify the email configuration is correct. It's not important what it is except if your email server only allows local delivery.
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startup_check_address: test@authelia.com
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trusted_cert: ""
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disable_require_tls: false
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disable_verify_cert: false
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disable_html_emails: false
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```
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## Configuration options
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Most configuration options are self-explanatory, however here is an explanation of the ones that may not
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be as obvious.
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### identifier
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The name to send to the SMTP server as the identifier with the HELO/EHLO command. Some SMTP providers like Google Mail
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reject the message if it's localhost.
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### subject
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This is the subject Authelia will use in the email, it has a single placeholder at present `{title}` which should
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be included in all emails as it is the internal descriptor for the contents of the email.
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### disable_require_tls
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For security reasons the default settings for Authelia require the SMTP connection is encrypted by TLS. See [security] for
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more information. This option disables this measure (not recommended).
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### disable_verify_cert
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For security reasons Authelia only trusts certificates valid according to the OS's PKI chain. See [security] for more information.
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This option disables this measure (not recommended).
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### disable_html_emails
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This option forces Authelia to only send plain text email via the notifier. This is the default for the file based
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notifier, but some users may wish to use plain text for security reasons.
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### trusted_cert
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This option allows you to specify the file path to a public key portion of a X509 certificate in order to trust it, or
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certificates signed with the private key portion of the X509 certificate. This is an alternative to `disable_verify_cert`
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that is much more secure. This is not required if your certificate is trusted by the operating system PKI.
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## Using Gmail
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You need to generate an app password in order to use Gmail SMTP servers. The process is
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described [here](https://support.google.com/accounts/answer/185833?hl=en)
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```yaml
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notifier:
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smtp:
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username: myaccount@gmail.com
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# Password can also be set using a secret: https://docs.authelia.com/configuration/secrets.html
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password: yourapppassword
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sender: admin@example.com
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host: smtp.gmail.com
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port: 587
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```
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## Loading a password from a secret instead of inside the configuration
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Password can also be defined using a [secret](../secrets.md).
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[security]: ../../security/measures.md#notifier-security-measures-smtp |