Configuring SMTP Server settings
You can set up an SMTP server to enable alerts for EMS and endpoint events. When an alert is triggered, EMS sends an email notification to the configured email address(es).
To configure SMTP server settings:
- Go to System Settings > SMTP Server.
- Set the following options:
Option
Description
Server
Enter the SMTP IP address or fully qualified domain name.
Port
Enter the port number.
Security
Select None, STARTTLS, or SMTPS for the security type, or select Auto Detect to automatically select the security type. If you select STARTTLS or SMTPS, the Username and Password fields become available.
Username
Enter the username.
Password
Enter the password.
Default Email Size
EMS detects the maximum email size from the configured SMTP server and sets it as the default value. Otherwise, EMS sets the default value to 10 MB.
Custom Email Size
You can optionally configure a custom email size in MB. If you configure a size larger than the maximum and default value, EMS displays a warning as such.
From
Enter the email address to send the alerts from.
Reply to
Enter the email address to send the replies to.
Subject
The sent e-mail alert's subject.
Recipients
Enter email address(es) to send alerts to. Press Enter to add more email addresses.
Test Subject
Test email's subject.
Test Message
Test email's message.
Test Recipient
Email address to send the test email to.
Send Test Email
Click the button to test the configured email settings.
- Click Save.
To confirm that the EMS server can verify the SMTP server certificate:
When using STARTTLS or SMTPS, the SMTP server presents a certificate to prove its identity. If the server hosting EMS does not have the corresponding CA in its certificate store, EMS cannot trust the SMTP server certificate and the connection fails to establish.
You can verify this using tools on the server hosting EMS to establish a secure connection to the SMTP server. Using openssl as an example, you can run the following from the Windows command line:
openssl s_client -starttls smtp -crlf -connect <smtp_url:port>
The following is an example of an SMTP URL and port: smtp.office365.com:587
The command output displays the certificate that the mail server offers in the first few lines, accompanied by unable to get local issuer certificate. This indicates that the certificate presented by the SMTP server cannot be verified.
