Hello
Can you please exam the email address referenced in the delivery report email, and see if it is indeed the exact same email for this particular recipient?
Does this happen to anyone you sent invitiation to, or just one person?
For teams invites i get Your message wasn't delivered because the recipient's email provider rejected it.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(188.79999999999998, 74%, 28%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAT%3C/text%3E%3C/svg%3E)
Andy T
0
Reputation points
When sending calendar invite from my personal hotmail account with Teams meeting details included i get:
Delivery has failed to these recipients or groups:
(******@email.com) Your message wasn't delivered because the recipient's email provider rejected it.
How do i prevent this? I can send the recipients an email normally and include the teams link in that.
Thanks in advance.
Outlook | Windows | New Outlook for Windows | For home
1 answer
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EmilyS726 174.8K Reputation points Independent Advisor2025-10-25T16:04:06.8566667+00:00 -
Andy T 0 Reputation points
2025-10-25T16:09:33.5533333+00:00 The email address(es) I send to are correct. I can send them an email or indeed a calendar invite if it doesn't have a Teams link in it. Only when i include the Teams meeting details is it blocked. It is the same if i send to one person or a group of people.
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EmilyS726 174.8K Reputation points Independent Advisor
2025-10-25T16:11:07.9333333+00:00 So it happens to anyone or just some people??
Can you share the complete error message in the delivery report (redact private information). Thanks!
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Andy T 0 Reputation points
2025-10-25T16:19:38.9033333+00:00 Delivery has failed to these recipients or groups:
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
email address here.
Your message wasn't delivered because the recipient's email provider rejected it.
Diagnostic information for administrators:
Generating server: AM7P189MB0632.EURP189.PROD.OUTLOOK.COM
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
email address here.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
Original message headers:
Received: from VI1P18901MB0766.EURP189.PROD.OUTLOOK.COM
(2603:10a6:800:128::11) by AM7P189MB0632.EURP189.PROD.OUTLOOK.COM
(2603:10a6:20b:122::12) with Microsoft SMTP Server (version=TLS1_2,
cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9253.16; Sat, 25 Oct
2025 14:49:58 +0000
Received: from VI1P18901MB0766.EURP189.PROD.OUTLOOK.COM
([fe80::8958:d8c3:c462:513e]) by VI1P18901MB0766.EURP189.PROD.OUTLOOK.COM
([fe80::8958:d8c3:c462:513e%2]) with mapi id 15.20.9253.013; Sat, 25 Oct 2025
14:49:58 +0000
Content-Type: application/ms-tnef; name="winmail.dat"
Content-Transfer-Encoding: binary
From: email address here.
To: email addresses here.
Subject: xxxxxxxxxx
Thread-Topic: yyyyyyyyyyyyy
Thread-Index: AdxFqiKzHs2cwHJFQh+utkzgOJgKNg==
X-MS-Exchange-MessageSentRepresentingType: 1
X-MS-Exchange-Calendar-Series-Instance-Id: BAAAAIIA4AB0xbcQGoLgCAAAAAAAwGptskXcAQAAAAAAAAAAEAAAAFE9d4Ky7XNLpMZ6cqESxNk=
Date: Sat, 25 Oct 2025 14:49:58 +0000
Message-ID: ******@VI1P18901MB0766.EURP189.PROD.OUTLOOK.COM
Accept-Language: en-GB, en-US
Content-Language: en-GB
X-MS-Has-Attach:
X-MS-TNEF-Correlator: ******@VI1P18901MB0766.EURP189.PROD.OUTLOOK.COM
MIME-Version: 1.0
X-MS-TrafficTypeDiagnostic:
VI1P18901MB0766:EE_MeetingMessage|AM7P189MB0632:EE_MeetingMessageX-MS-PublicTrafficType: Email
Return-Path: email address here.
X-MS-Office365-Filtering-Correlation-Id: 22aeca29-f52a-4cd0-aa7d-08de13d5c4c5
X-Microsoft-Antispam:
BCL:0;ARA:14566002|9400799040|31061999003|461199028|41001999006|15030799006|12050799012|8062599012|15080799012|19110799012|8060799015|440099028|10035399007|3412199025|4302099013|26005399003|11135399003|8132099013;X-Microsoft-Antispam-Message-Info:
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