When I send from outlook.com to qkstream.com packets never arrive from microsofts outbound ip addresses. Yet I can see the packets fine if I send from outlook.com to tgrand.com -----Original Message----- From: Nate Itkin Sent: Wednesday, September 9, 2015 2:38 PM To: Todd K Grand Subject: Re: outlook.com outgoing blacklists? Server response to rcpt to:<support@qkstream.com> was a little slow. Maybe LookOut.com has a very short timeout? You might want to fire-up tcpdump on your end and see what transpires when you try to send from LookOut.com. On Wed, Sep 09, 2015 at 02:24:12PM -0500, Todd K Grand wrote:

another email domain hosted on the same server is tgrand@tgrand.com. Hotmail/Outlook can send fine to this domain.

-----Original Message----- From: Todd K Grand Sent: Wednesday, September 9, 2015 2:19 PM To: Steve Atkins ; nanog list Subject: Re: outlook.com outgoing blacklists?

Content-Type: message/delivery-status

Reporting-MTA: dns;COL004-OMC2S2.hotmail.com Received-From-MTA: dns;COL129-W41 Arrival-Date: Wed, 9 Sep 2015 02:13:28 -0700

Final-Recipient: rfc822;support@qkstream.com Action: failed Status: 5.5.0 Diagnostic-Code: smtp;554 The mail could not be delivered to the recipient because the domain is not reachable. Please check the domain and try again (-744508417:308:-2147467259)

Keep in mind that the address has a failed status even before sending on outlook.com webmail site.

-----Original Message----- From: Steve Atkins Sent: Wednesday, September 9, 2015 2:09 PM To: nanog list Subject: Re: outlook.com outgoing blacklists?

...

On Sep 9, 2015, at 11:43 AM, Steve Atkins <steve@blighty.com> wrote:

...

Anybody have some recommendations on how I resolve this

The most likely explanation is a configuration error at your end, so the first step is to share what the domain is.

Todd shared the domain with me privately.

The DNS configuration (and SMTP and TLS) looks fine, with nothing out of the ordinary, to me too.

So the next thing to look at would be the rejection message.

Cheers, Steve=