Restricting MTA access with a single IP address using the CLI

Use the CLI commands in this topic to configure the MTA access restriction with a single IP address.

To configure the MTA access restriction with a single IP address:

Go to CLI configuration mode.

hostname > enable
hostname # configure terminal

Specify a single IP address for the MTA access restriction.
The following example command restricts all MTA hosts except the specified IPv4 address in Drop analysis mode:
```
hostname (config) # email-analysis mta mynetworks 172.16.183.3
```
MODE is drop
The following example command restricts all MTA hosts except the specified IPv6 address in Drop analysis mode:
hostname (config) # email-analysis mta mynetworks 2001:470:84a7:3066::aa0
MODE is drop
IPv6 enabled
Verify your changes.
hostname (config) # show email-analysis mta mynetworks
Note
The internal loopback address is not displayed in the show email-analysis mta mynetworks command output. Only values that you entered are displayed.
Save your changes.
```
hostname (config) # write memory
```

This example shows that all MTA hosts are restricted except the specified IPv4 address.

hostname (config) # show email-analysis mta mynetworks

172.16.183.3

This example shows that all MTA hosts are restricted except the specified IPv6 address.

hostname (config) # show email-analysis mta mynetworks

[2001:470:84a7:3066::aa0]