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IMPORTANT
SNS 3.x versions have reached End of Maintenance since July 1st, 2024.
We recommend that you update your SNS firewalls to a version with maintenance to guarantee the protection of your infrastructure.

# SMTP Commands tab

This menu allows you to authorize or reject SMTP commands defined in the RFCs. You can let commands pass, block them or analyze the syntax and check that the command complies with the current RFCs in force.

## Proxy

### Main commands

The button Modify all commands makes it possible to allow, reject or check all commands.

Command | Indicates the name of the command.
Action | Indicates the action performed.

### Other commands allowed

Command | By default, all commands not defined in the RFCs are prohibited. However, some mail systems use additional non-standard commands. You can therefore add these commands in order to let them pass through the firewall. The buttons Add and Delete allow you to modify the list of commands.

## IPS

### Allowed SMTP commands

List of additional SMTP commands allowed. It is possible to Add or Delete commands.

### Prohibited SMTP commands

List of prohibited SMTP commands. It is possible to Add or Delete commands.