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MS Azure IPs blacklisted

Question
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Dear Support Team,
e-mails sent via my Office 365 account from the app in MS Azure get rejected by receiver's incoming mail servers. It's caused by the fact, that originating IP address belonging to MS Azure is blacklisted in spamhaus (for example 104.46.52.73). What do I have to do in order to make sure the e-mails will reach recipients?
Kind regards,
Tomasz
Tuesday, June 27, 2017 9:00 AM
All replies
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I'm getting the following response:
Delivery has failed to these recipients or groups:
my-email<at>gmail.com
Your message wasn't delivered because the recipient's email provider rejected it.
Diagnostic information for administrators:
Generating server: AM5PR1001MB1058.EURPRD10.PROD.OUTLOOK.COM
my-email@gmail.com
Remote Server returned '550 5.7.501 Service unavailable, Client host blocked using Spamhaus. To request removal from this list see http://www.spamhaus.org/lookup.lasso (AS16042849)'
Original message headers:
Authentication-Results: gmail.com; dkim=none (message not signed)
header.d=none;gmail.com; dmarc=none action=none header.from=mydomain.com;
Received: from RD00155D49BC06 (104.46.52.73) by
AM5PR1001MB1058.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:203:12::17) with
Microsoft SMTP Server (version=TLS1_2,
cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1220.11; Tue, 27
Jun 2017 07:52:26 +0000
MIME-Version: 1.0
From: no-reply<at>mydomain.com
To: my-email<at>gmail.com
Date: 27 Jun 2017 07:52:25 +0000
Subject: Confirm your account
Content-Type: text/html; charset=us-ascii
Content-Transfer-Encoding: quoted-printable
X-Originating-IP: [104.46.52.73]
X-ClientProxiedBy: VI1PR0102CA0020.eurprd01.prod.exchangelabs.com
(2603:10a6:802::33) To AM5PR1001MB1058.EURPRD10.PROD.OUTLOOK.COM
(2603:10a6:203:12::17)
Return-Path: no-reply<at>mydomain.com
Message-ID:
<AM5PR1001MB10587A0FB385F3EDDADE56C0FDDC0@AM5PR1001MB1058.EURPRD10.PROD.OUTLOOK.COM>
Tuesday, June 27, 2017 5:11 PM -
And ipwhois results for 104.46.52.73:
104.46.52.73 - Geo Information
IP Address 104.46.52.73
Host 104.46.52.73
Location NL NL, Netherlands
City Amsterdam, 07 1091
Organization Microsoft Azure
ISP Microsoft Corporation
AS Number AS8075 Microsoft Corporation
Latitude 52°35'00" North
Longitude 4°91'67" EastTuesday, June 27, 2017 5:12 PM -
It is MS address and Office 365 as SaaS is also hosted in same datacenters as Azure.
Still this isn't problem with Azure but with Office 365 and you should contact O365 team for this.
To verify, try sending mail to same address using same account with OWA or Outlook, you shoud get same report.
- Proposed as answer by rnihad Tuesday, July 18, 2017 2:49 PM
Tuesday, June 27, 2017 6:56 PM -
I've sent some e-mails via online outlook and they have always reached recipients. It looks like different IP is used in that case.Tuesday, July 4, 2017 8:05 AM