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

Joe Stolz 11 Reputation points
2022-06-28T00:52:59.877+00:00

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

sxxx@groups.outlook.com
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??

Not Monitored
Not Monitored
Tag not monitored by Microsoft.
24,012 questions
{count} votes

1 answer

Sort by: Most helpful
  1. Dave Patrick 330.7K Reputation points
    2022-06-28T01:21:26.417+00:00

    Outlook.com (hotmail) is not currently supported here on Q&A. The product group for Outlook.com actively monitors questions in dedicated forums here.
    https://answers.microsoft.com/en-us/outlook_com/forum/oemail

    --please don't forget to upvote and Accept as answer if the reply is helpful--

    No comments