> a postfix-tlspol user recently noted unexpected behavior when
> Postfix (starting with 3.10.5) uses the STS policy attribute
> mx_host_pattern for MX selection (enabled by default by
> smtp_tls_enforce_sts_mx_patterns and effective when QUERYwithTLSRPT
> method of postfix-tlspol is used, regardless of whether TLSRPT is
> enabled or not).
>
> While reviewing this, I found that postfix-tlspol versions v1.8.15
> through v1.8.20 contain a regression introduced during a refactoring
> change.
...
> The regression is fixed in postfix-tlspol v1.8.21.
>
> Anyone running Postfix 3.10.5 with postfix-tlspol v1.8.15 - v1.8.20
> should upgrade to v1.8.21 as soon as possible.
As a temporary workaround you can set "smtp_tls_enforce_sts_mx_patterns
= no" in main.cf.
Wietse
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