Outlook is returning Remote Server returned '421 4.3.2 Service not available' for two of my groups.outlook.com groups

Anonymous
2022-06-28T02:36:22+00:00

* * * Mod note: See the post by Diane Poremsky MVP * * *

Yesterday and today outlook.com is refusing all group email.
I have two different groups that I use weekly. Today I get this message.'

The recipient's email system isn't accepting messages now. Please try resending your message later or contact the recipient directly.

Generating server: BN6PR19MB0962.namprd19.prod.outlook.com
Total retry attempts: 4

___@___.___
Remote Server returned '421 4.3.2 Service not available'

Original message headers:

Received: from SA0PR19MB4412.namprd19.prod.outlook.com (2603:10b6:806:ba::17)
by BN6PR19MB0962.namprd19.prod.outlook.com (2603:10b6:404:74::9) with
Microsoft SMTP Server (version=TLS1_2,
cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5373.18; Sun, 26 Jun
2022 19:00:06 +0000
Received: from DM4PR19MB6342.namprd19.prod.outlook.com (2603:10b6:8:a7::11) by
SA0PR19MB4412.namprd19.prod.outlook.com (2603:10b6:806:ba::17) with Microsoft
SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id
15.20.5373.18; Sun, 26 Jun 2022 18:59:37 +0000
Received: from DM4PR19MB6342.namprd19.prod.outlook.com

WHAT IS GOING ON WITH OUTLOOK GROUPS??

I create a NEW group to test and it ALSO returns the same error.

* Pinned until August 1, 2022.

Outlook | Web | Outlook.com | Contacts

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  1. Anonymous
    2022-07-07T02:40:45+00:00

    I am also having problems with group emails. Apparently many others are as well and this has been going on for almost 2 weeks. Is Microsoft even trying to fix the issue???

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  2. Anonymous
    2022-07-07T07:35:52+00:00

    https://portal.office.com/ServiceStatus

    Yesterdays update says

    Current status: We've identified another service update that is contributing to the impact. We're preparing to revert this update, which we expect will resolve the problem in full.

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  3. Anonymous
    2022-07-07T21:08:42+00:00

    Its a bit rubbish isn't it.? ..might have to go to googlemail service. So annoying! its been weeks....but thank you so much for finding this out at the very least x

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  4. Anonymous
    2022-07-07T21:51:53+00:00

    From https://portal.office.com/ServiceStatus at ~22:00 UTC Juy 7

    "Current status: We've completed the development of our fix to revert the offending update and resolve the problem in full, and we're validating the fix for efficacy before deploying to the affected service environment. Pending successful validation, we expect the fix will begin deployment on Friday, July 8, 2022, and anticipate a more precise time for complete deployment and remediation as it progresses."

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  5. Anonymous
    2022-07-09T18:26:45+00:00

    On Saturday the group email still does not work. Received same error code as previous "Remote Server returned '421 4.3.2 Service not available"

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