Postfix set the message header translation, the domain mail does not carry on the message header translation, only sends to the external network carries on the mail header translation?

Postfix set the message header translation, the domain mail does not carry on the message header translation, only sends to the external network carries on the mail header translation?

Now set the

Smtp_generic_maps = hash:/etc/postfix/= hash:/etc/postfix/== Static:all

Will the mail sent to the local domain be translated as well? There is no setting to send only the replacement to the other.

Postfix set the message header translation, the domain mail does not carry on the message header translation, only sends to the external network carries on the mail header translation?