Hello,
messages to *@ewnederland.nl are deferred by postfix-3.0.x here.
https://dane.sys4.de/smtp/ewnederland.nl say "No TLSA records." in contrast: # posttls-finger ewnederland.nl posttls-finger: warning: DANE TLSA lookup problem: Host or domain name not found. Name service error for name=_25._tcp.remote.meulen.nl type=TLSA: Host not found, try again posttls-finger: warning: DANE TLSA lookup problem: Host or domain name not found. Name service error for name=_25._tcp.remote.meulen.nl type=TLSA: Host not found, try again posttls-finger: Failed to establish session to ewnederland.nl via remote.meulen.nl: TLSA lookup error for remote.meulen.nl:25
as a workaround I configure "ewnederland.nl may" in smtp_tls_policy_map. are there better ways?
Thanks Andreas