redondos
public text v1 · immutable/etc/postfix/main.cf:
smtpd_recipient_restrictions =
check_recipient_access hash:/etc/postfix/protected_destinations
smtpd_restriction_classes = insiders_only
insiders_only = check_sender_access hash:/etc/postfix/insiders, reject
/etc/postfix/protected_destinations:
domain.tld insiders_only
/etc/postfix/insiders:
1.2.3.4 OK this address is allowed to send mail to domain1.tld
this.host.tld OK this address is allowed to send mail to domain1.tld