Answer
The local IP address range defines which machines are allowed to send email to external address using your server. By default, the IP address range will be your C-Class address.
Using the Security>Local IP page you can define which IP addresses are ?trusted? IP addresses. You may need to increase the range to include other C-Class addresses or single, specific IP addresses.
If you need to allow users outside these ranges to use your server, see Q0173.
See Also:
- Why do users see my domain name when they telnet to the POP3 service?
- Does GMS Mail Support APOP?
- What user authentication options are available on Windows systems
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