i have problems with the smtp proxy configuration, because send me that i am a open smtp relay, this is my configuration:
Hostname (mx): mail.mydomain.com
Postmaster address: administrator@mydomain.com
Max messagesize: unlimited
Incoming mail
mydomain.com internalmail
Outgoing Mail
Allow networks Internal_network
private-network-ipsec-lan
Use smarthost: nothing
tls transaction encryption: nothing
Global Whitelist
Trusted hosts/networks : any
trusted domains: nothing
Anti-spam /content control : nothing
Help me please ¡¡¡
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