To use host-specific rather than sender-dependent authentication, you'll need a separate transport for the relay(s) in question, with "smtp_sender_dependent_authentication = no" for that transport.
> On Dec 11, 2018, at 2:37 PM, Stefan Bauer <cubew...@googlemail.com> wrote: > > I dont see a way to have AUTH&TLS to all of our relayhosts but not for this > internal hosts. > > sender_dependent_relayhost_maps = hash:/etc/postfix/relayhost_maps > smtp_sender_dependent_authentication = yes > smtp_sasl_password_maps = hash:/etc/postfix/smtp_auth > smtp_sasl_auth_enable = yes > smtp_tls_security_level = may > smtp_sasl_security_options = noanonymous > > root@postgate01:/etc/postfix# more relayhost_maps > @domain1.de [securerelay.tld]:25 > @domain2.de [securerelay.tld]:25 > -- Viktor.