I'm currently an Office365 customer. Some emails are getting through to my inbox while others are getting rejected. It's from different ISP's (I think that's the right word) too. One email is from a '@mimic.pro' and another is from a '@post.harvard.edu'.
Here is the error:
> Delivery to the following recipient failed permanently:
>
> ryan@kanopyinsurance.com
>
> Technical details of permanent failure:
> Google tried to deliver your message, but it was rejected by the server for
> the recipient domain kanopyinsurance.com by smtp.secureserver.net.
> [216.69.186.201].
>
> The error that the other server returned was:
> 550 #5.1.0 Address rejected.
>
> ----- Original message -----
>
> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
> d=gmail.com; s=20120113;
> h=x-received:mime-version:sender:in-reply-to:references:from:date
> :x-google-sender-auth:message-id:subject:to:content-type;
> bh=WONu5quKeyjCst10qVSzpBwPDA3vQ6/HP1iYD4Z3CGc=;
> b=qObdTZx9xj7Bw+RzpmHYkC/luSsMXqQd3R39X6ICnksUPMcS5jrf9M4m7gOBT1WtVk
>
> Pjjj15iYdvrLVaUIEl10CGnW7LkDX4COfxdgBO7tDaws0O8XdHUNAb1BP5DPy1AxkkBe
>
> tKRlzTiwohWEqCXYSaK+UOLcoA0876OYURtC3JvSB5ozl6skvlwRDblr7kXM3x0kbExg
>
> YsbMSqU/OigDrL07BNnapfAI/TMUNizyRmXQD9gslACw/J0ceNr5NZEny5cByPuQB0XJ
>
> qppvETI/hV5X16UMGr11oOTroTX8rlNvKNQt+BkTpHdbUooaU7t5Likaebm8yqCfTKAo
> BMbw==
> X-Received: by 10.50.192.197 with SMTP id hi5mr174279igc.45.1359756786185;
> Fri, 01 Feb 2013 14:13:06 -0800 (PST)
> MIME-Version: 1.0
> Sender: cskarinka@gmail.com
> Received: by 10.64.10.227 with HTTP; Fri, 1 Feb 2013 14:12:25 -0800 (PST)
> In-Reply-To:
> <AF6A950D0DDB4B4483DC1B84D8B9A1773F9CC5@BN1PRD0412MB604.namprd04.prod.outlook.com>
> References:
> <AF6A950D0DDB4B4483DC1B84D8B9A1773F9CC5@BN1PRD0412MB604.namprd04.prod.outlook.com>
> From: Chris Skarinka <skarinka@post.harvard.edu>
> Date: Fri, 1 Feb 2013 17:12:25 -0500
> X-Google-Sender-Auth: cvrlbbL071mqGXTIQSApuGaM44Y
> Message-ID:
> <CAEFpNwM7370Lw0VqA0sGSu-Rs6+QsWsfO7istVs-aBmm_S+ndg@mail.gmail.com>
> Subject: Re: Test
> To: Ryan McClintock <ryan@kanopyinsurance.com>
> Content-Type: multipart/alternative; boundary=14dae9340d3f38b49304d4b10c9b
>
> Received