Mail server (SMTP)

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alerts users via email when certain system events occur (for example, a cryptographic key failure or a system restart that is due to a device update).

To use email-based features, configure the mail server that will handle the traffic and define email notification groups that will receive email alerts.

Connection security

When you configure SMTP settings, the security level that you select must correspond to the security configuration of your SMTP server. To determine the appropriate SMTP security level, use the following table or contact the mail server administrator.

SMTP security levels

SMTP security level

Description

Insecure

No security is applied. The system sends all email messages to the SMTP server in plain text.

SMTPS

When the connection is established, the device uses TLS/SSL to secure the connection. This protocol typically uses port 465.

When you select this level of security, the device expects to authenticate a certificate received from the mail server. The device has an array of popular certificates for this purpose.

If the mail server uses a self-signed certificate, you can configure the device to accept such certificates without requiring authentication. To enable this feature, when configuring the mail server settings, select the option for self-signed certificates.

STARTTLS

The device opens an insecure connection and then uses STARTTLS to open a secure TLS/SSL conversation. This protocol typically uses the default port 25.

STARTTTLS

The device opens a non-secure connection and then uses STARTTLS to open a secure TLS/SSL conversation. If secure communication cannot be established, the system makes a second attempt with a non-secure connection. This protocol typically uses the default port 25.

Related topics

Network-identity-DNS
Configuring-SMTP-settings

 

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