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more logging around smtp and mtasts tls connections

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i wondered why self-signed mtasts certs didn't result in delivery failure. it's
because it was a first-time request of the mtasts policy (clean test
container). and for that case it means mtasts should be ignored.
This commit is contained in:
Mechiel Lukkien
2023-06-04 17:55:55 +02:00
parent 5a4f35ad5f
commit c9a846d019
2 changed files with 3 additions and 2 deletions
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mtastsdb/db.go
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@ -233,6 +233,7 @@ func Get(ctx context.Context, resolver dns.Resolver, domain dns.Domain) (policy
switch {
case errors.Is(err, mtasts.ErrNoRecord) || errors.Is(err, mtasts.ErrMultipleRecords) || errors.Is(err, mtasts.ErrRecordSyntax) || errors.Is(err, mtasts.ErrNoPolicy) || errors.Is(err, mtasts.ErrPolicyFetch) || errors.Is(err, mtasts.ErrPolicySyntax):
// Remote is not doing MTA-STS, continue below. ../rfc/8461:333 ../rfc/8461:574
log.Debugx("interpreting mtasts error to mean remote is not doing mta-sts", err)
default:
// Interpret as temporary error, e.g. mtasts.ErrDNS, try again later.
return nil, false, fmt.Errorf("lookup up mta-sts policy: %w", err)