The headers in particular.
And is this to Hotmail, et al or Office365?

Sent from my Windows Phone
From: Steve Atkins<>
Sent: ‎9/‎21/‎2016 5:56 AM
To: mailop<>
Subject: Re: [mailop] anyone from Microsoft around ?

> On Sep 21, 2016, at 4:02 AM, Gilles Chehade <> wrote:
> I'm wondering if there is something wrong in the format of our headers
> and if this could affect users of our software disregarding the kind
> of mails they send with it. I've been tackling this for hours before
> contacting the mailing list.
> Any help would be greatly appreciated, I'm running out of ideas :-)

Sharing a sample of those headers on a paste site (and maybe
a protocol level trace of a failing transaction) might get you some
feedback on whether anything looks off about them.


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