IMAP Emails Rejected

IMAP Emails Rejected

My IMAP emails are being rejected by Gmail and Hotmail servers. It looks like there is a problem with sending it through the CRM.  Anyone having problems with this?

SNT004-MC3F32.hotmail.com rejected your message to the following email addresses:

BJ@Hotmail.com
 A problem occurred while delivering your message to this email address. Try sending your message again. If the problem continues, please contact your email admin.

SNT004-MC3F32.hotmail.com gave this error:
Requested action not taken: mailbox unavailable 

Diagnostic information for administrators:

Generating server: BY1PR0301MB1270.namprd03.prod.outlook.com

BJGish@Hotmail.com
SNT004-MC3F32.hotmail.com
Remote Server returned '550 Requested action not taken: mailbox unavailable'

Original message headers:

Received: from 172.31.243.31 (72.5.230.65) by
 BY1PR0301MB1270.namprd03.prod.outlook.com (25.161.205.144) with Microsoft
 SMTP Server (TLS) id 15.1.87.18; Mon, 16 Feb 2015 23:32:04 +0000
Date: Mon, 16 Feb 2015 15:32:00 -0800
From: Chris Wynn <c.wynn@worldventure.com>
To: <BJGish@Hotmail.com>
Message-ID: <924266892.181568.1424129524804.JavaMail.sas@[172.31.243.31]>
Subject: how is the proposal coming
MIME-Version: 1.0
Content-Type: multipart/mixed;
	boundary="----=_Part_181566_1188659052.1424129520056"
Return-Path: c.wynn@worldventure.com
X-Originating-IP: [72.5.230.65]
X-ClientProxiedBy: BY2PR12CA0008.namprd12.prod.outlook.com (25.160.121.18) To
 BY1PR0301MB1270.namprd03.prod.outlook.com (25.161.205.144)
Authentication-Results: Hotmail.com; dkim=none (message not signed)
 header.d=none;
X-Microsoft-Antispam: UriScan:;
X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;SRVR:BY1PR0301MB1270;
X-Exchange-Antispam-Report-Test: UriScan:;
X-Exchange-Antispam-Report-CFA-Test:
	BCL:0;PCL:0;RULEID:(601004);SRVR:BY1PR0301MB1270;
X-Forefront-PRVS: 0489CFBAC9
X-Forefront-Antispam-Report:
	SFV:NSPM;SFS:(10009020)(6049001)(6009001)(122386002)(40100003)(62966003)(450100001)(77156002)(229853001)(110136001)(16236675004)(50986999)(66066001)(19580395003)(2351001)(107886001)(54356999)(512874002)(46102003)(87976001)(5000100001)(4610100001)(84326002)(92566002)(86816001)(561944003)(15974865002)(86362001)(42186005)(93906001)(7099025)(51586002)(85226002)(1531001);DIR:OUT;SFP:1101;SCL:1;SRVR:BY1PR0301MB1270;H:172.31.243.31;FPR:;SPF:None;MLV:ovrnspm;PTR:InfoNoRecords;LANG:en;
X-Exchange-Antispam-Report-CFA-Test: BCL:0;PCL:0;RULEID:;SRVR:BY1PR0301MB1270;
X-OriginatorOrg: worldventure.com
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Feb 2015 23:32:04.9289 (UTC)
X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY1PR0301MB1270