Geoblocking restricts email based on a sender's geographic location, which is identified by the sending server's IP address.
In SpamTitan, geoblocking is based on rules and exemptions. You create a geoblocking rule to restrict email from a geographic location (country) and then exemptions can be added to exclude mail from the geoblocking rules. Email can be excluded based on:
IP (the IPv4 address that an email originates from).
Domain (the domain an email originates from).
Email (the email address that the email is sent from).
An MSP admin can enable or disable geoblocking at a global level (default: disabled). Once enabled, geoblocking can be managed at the customer and domain levels. Each level can apply its own geoblocking rules, with rules being inherited from a higher level by default. If applied, a lower level rule supersedes a higher level rule.
If disabling geoblocking, all geoblocking rules must be deleted to ensure geoblocking is turned off.
Example: If Country_Example is blocked by the MSP admin, all customers and domains inherit this rule and block email from Country_Example. However, if Customer A wants to allow email from Country_Example, the Customer A admin can create a rule that will supersede the MSP level rule.
SpamTitan uses the ISO 3166 Alpha-2 standard of two digit country codes for geoblocking. See https://www.iso.org/obp/ui/#search/code/ (reference data in the Alpha-2 column).
Go to Filtering > Geoblocking to enable and manage geoblocking.