WorkMail suddenly quit working for incoming mail

Question

My Amazon WorkMail suddenly quit working for incoming email, but I can still use it for outgoing.  I've changed nothing in my configuration.  Ideas?  Here is the returned mailer message:

Delivery has failed to these recipients or groups:
scotto@chateausylvania.com
Your message couldn't be delivered. Try to send it again later. If the problem continues, please contact your email admin.

Diagnostic information for administrators:
Generating server: inbound-smtp.us-east-1.amazonaws.com
scotto@dmain.com
Remote Server returned '554 4.3.0 < #4.3.0 smtp; 451 4.3.0 This message could not be delivered due to a recipient error. Please try again later.>'
Original message headers:
ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none;
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ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com;
 s=arcselector9901;
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ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass
 smtp.mailfrom=snhu.edu; dmarc=pass action=none header.from=snhu.edu;
 dkim=pass header.d=snhu.edu; arc=none
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=snhu.onmicrosoft.com;
 s=selector2-snhu-onmicrosoft-com;
 h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;
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Received: from DS7PR05MB7221.namprd05.prod.outlook.com (2603:10b6:5:2d2::15)
 by SN6PR05MB4592.namprd05.prod.outlook.com (2603:10b6:805:2d::10) with
 Microsoft SMTP Server (version=TLS1_2,
 cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5273.5; Thu, 19 May
 2022 17:10:43 +0000
Received: from DS7PR05MB7221.namprd05.prod.outlook.com
 ([fe80::ecd9:ac0c:f727:5e56]) by DS7PR05MB7221.namprd05.prod.outlook.com
 ([fe80::ecd9:ac0c:f727:5e56%6]) with mapi id 15.20.5293.007; Thu, 19 May 2022
 17:10:43 +0000
From: ", Scott" 
To: Scott  
Subject: test
Thread-Topic: test
Thread-Index: Adhro15u0LBfykd7SgaL9p5aouINYA==
Date: Thu, 19 May 2022 17:10:43 +0000
Message-ID:
 
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach: yes
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authentication-results: dkim=none (message not signed)
 header.d=none;dmarc=none action=none header.from=snhu.edu;
x-ms-publictraffictype: Email
x-ms-office365-filtering-correlation-id: 50542666-a20f-45b1-df02-08da39ba821e
x-ms-traffictypediagnostic: SN6PR05MB4592:EE_
x-microsoft-antispam-prvs:
 
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x-ms-exchange-antispam-relay: 0
x-microsoft-antispam: BCL:0;
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x-forefront-antispam-report:
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x-ms-exchange-antispam-messagedata-chunkcount: 1
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robinkaws · Answer

Hi,

I'm sorry to hear you're experiencing problems receiving mail. I took a look at your domain and it seems there are two rules in your SES inbound rule set. A "Catch all" rule and the WorkMail rule. If the "Catch all" rule fails, it will not continue with the WorkMail rule. Please verify the "Catch all" rule works correctly in order to receive mail in WorkMail.

Kind regards,
Robin

WorkMail suddenly quit working for incoming mail

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