DMARC - or is it

cyg Simple
Tue Nov 29 16:19:00 GMT 2016

I find this excerpt from cygwin-help a bit confusing.  Notice the
"" in the "Remote host said:" message.  What's really going on
here?  Why is doing the authentication for a address?

Received: (qmail 130602 invoked for bounce); 17 Nov 2016 10:26:04 -0000
Date: 17 Nov 2016 10:26:04 -0000
Subject: failure notice

Hi. This is the qmail-send program at
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.

User and password not set, continuing without authentication.
<> failed after I sent the message.
Remote host said: 550-5.7.1 Unauthenticated email from is not
accepted due to domain's
550-5.7.1 DMARC policy. Please contact the administrator of
domain if
550-5.7.1 this was a legitimate mail. Please visit
550-5.7.1 to learn about the
550 5.7.1 DMARC initiative. e69si30940847pfk.231 - gsmtp

cyg Simple

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