[courier-users] 417 DNS lookup failure

Hi all,

I have problem with receiving mails from domain sauer-danfoss.com.
The mail is refused on smtp level with error "417 DNS lookup failure".
Testmxlookup returns soft error.
The secondary mx server for this domain can not be resolved. The
primary mx for this domain is up and resolving is ok.
It looks like courier refuses e-mails from such domains. It is a
correct behaviour or a bug?

Regards

Jan


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