Google Message Security Batch Reference Guide - Manual (Page 201)

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iplock add_range
The iplock add_range command allows emails from specific domains with specific
IP addresses to be delivered to an organization and its sub-organizations.
This command is applicable to the Google Message Security, Google Message
Discovery, and Google Message Filtering products only.
Syntax
iplock add_range org=, domain=,
range=[/]
Note: When adding an IP range using the iplock add_range command, new
ranges are not enabled by default (the default mode is off). To turn the IP Lock
rule on, you must set the command for mode=on. Run the following command to
enable your IP range:
iplock modify org=, domain=, mode=on
Examples
Single Domain and IP Address/CIDR Subnet
iplock add_range org=sales_email_config, domain=jumboinc.com,
range=64.18.0.0
iplock add_range org=sales_email_config, domain=jumboinc.com,
range=64.18.0.0/16
Description
Allows emails from specific domains with specific IP addresses to be delivered to
an organization and its sub-organizations. The sub-org’s settings will be
overwritten when parent org IP settings change. Peer organizations or
organizations higher in the hierarchy are not overwritten.