This solution applies to all Email Security Gateways.
You can allow internal users that are out of your network to authenticate against the mail server to send mail through Email Security Gateway.
Choose the type of authentication for external users in Basic / Outbound > SMTP Authentication/SASL Settings.
- You can choose one of the two authentication methods. In firmware versions after version 4.0, SMTP and LDAP Authentication is configured in Basic / Outbound > SMTP AUTH Proxy Settings.
- You will need to enter the IP address of the destination mail server which has the SMTP authentication enabled. In earlier firmware before 4.0 this information is configured on the LDAP pages. If you are running on v4 of the firmware you should update ASAP.
- In your email client you need to set the SMTP server as the external IP or Hostname of your Email Security Gateway.
- In your email client enable SMTP authentication.
Consult your email client documentation for information on how to enable SMTP Authentication in your email client.