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Does the ESA have the equivalent of a "hosts" file?
On UNIX, Linux, and Windows, the "hosts" file is a local table that lists host names and their IP addresses on a network. On some small networks, the hosts file is used as an alternative to DNS.
Hosts files cannot be used as an alternative to DNS with the ESA; however, there is a command that can be used to show a similar lookup table relevant to email routing. The ESA can be configured to redirect all email for a particular domain to a different mail exchange (MX) host. It is possible to view and configure these mappings from the AsyncOS CLI using the smtproutes command:
There are currently 1 routes configured.
Choose the operation you want to perform: - NEW - Create a new route. - DELETE - Remove a route. - PRINT - Display all routes. - IMPORT - Import new routes from a file. - EXPORT - Export all routes to a file. - CLEAR - Remove all routes. > print