Am 24.07.23 um 02:21 schrieb Corey Hickman via Postfix-users:
Hello
My settings for backup MX server are as follows. Do you think if they
have problems? I am looking for your kind suggestions.
smtpd_relay_restrictions = permit_mynetworks, permit_sasl_authenticated,
permit_mx_backup, reject_unauth_destination
smtpd_sender_restrictions = permit_mynetworks,
permit_sasl_authenticated, reject_unknown_client_hostname,
reject_unknown_sender_domain
Does your backup mx check for the existence of the users?
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