Qualcuno ha problemi a ricevere email sul proprio instance di Discourse self-hosted, ma solo da grandi provider come Google e Microsoft? Riesco a inviare email al mio instance usando un server email locale, iCloud e ProtonMail in modo coerente, ma con Gmail (incluso Gmail Workspace) e Office 365 ricevo il seguente errore:
## Messaggio non consegnato
Si è verificato un problema durante la consegna del messaggio a **[xxx@example.com](mailto:xxx@example.com)**. Consulta i dettagli tecnici di seguito.
La risposta è stata:
read error: FAILED_PRECONDITION: read error (104): Connection reset by peer
Reporting-MTA: dns; [googlemail.com](http://googlemail.com/)
Arrival-Date: Tue, 02 Nov 2021 13:12:55 -0700 (PDT)
X-Original-Message-ID: <[CAAY3Td6W+9uYHRVJ6A8=9pG4LhaJrYRAN16CWe=3_2gG9TH7Uw@mail.gmail.com](mailto:CAAY3Td6W+9uYHRVJ6A8=9pG4LhaJrYRAN16CWe=3_2gG9TH7Uw@mail.gmail.com)>
Final-Recipient: rfc822; [xxx@example.com](mailto:xxx@example.com)
Action: failed
Status: 4.4.2
Remote-MTA: dns; [reply-mx.example.com](http://reply-mx.example.com/). (xxx.yyy.zzz.163, il server per
dominio [example.com](http://example.com/).)
Diagnostic-Code: smtp; read error: FAILED_PRECONDITION: read error (104): Connection reset by peer
Last-Attempt-Date: Fri, 05 Nov 2021 17:08:12 -0700 (PDT)
>
**Da:** Kartik <[yyy@gmail.com](mailto:yyy@gmail.com)>
**Oggetto:** **Test da Gmail**
**Data:** martedì 2 novembre 2021 alle 15:12:39 CDT
**A:** [xxx@example.com](mailto:xxx@example.com)
[details="Oppure 'Socket error ConnectionReset' con O365:"]
Da: Microsoft Outlook <MicrosoftExchange329e71ec88ae4615bbc36ab6ce41109e@example.onmicrosoft.com>
Inviato: mercoledì 13 ottobre 2021 alle 10:32
A: xxx@example.com <xxx@example.com>
Oggetto: Non consegnato: oggetto email qui
>
La consegna è fallita per questi destinatari o gruppi:
xxx@example.com (xxx@example.com)
Il messaggio non è stato consegnato. Nonostante tentativi ripetuti di consegna, non è stato possibile stabilire una connessione con il server remoto.
Contatta il destinatario con altri mezzi (ad esempio telefonicamente) e chiedi di informare il proprio amministratore di posta che sembra che il tuo sistema di posta non riesca a connettersi al loro sistema. Fornisci i dettagli dell'errore riportati di seguito. È probabile che solo l'amministratore di posta del destinatario possa risolvere questo problema.
Per ulteriori informazioni e suggerimenti su come risolvere questo problema, consulta questo articolo: https://go.microsoft.com/fwlink/?LinkId=389361.
>
Informazioni diagnostiche per gli amministratori:
Server generatore: example.namprd11.prod.outlook.com
Server ricevente: example.namprd11.prod.outlook.com
Totale tentativi di ritentativo: 2
xxx@example.com
13/10/2021 16:32:36 - Il server su example.namprd11.prod.outlook.com ha restituito '550 5.4.317 Messaggio scaduto, impossibile connettersi al server remoto (451 4.4.0 Socket error ConnectionReset)'
13/10/2021 16:22:34 - Il server su example.com (xxx.yyy.zzz.163) ha restituito '450 4.4.317 Impossibile connettersi al server remoto [Messaggio=451 4.4.0 Socket error ConnectionReset] [UltimoNomeServerTentato=example.com] [UltimoIPTentato=xxx.yyy.zzz.163:25] [example.eop-nam12.prod.protection.outlook.com](451 4.4.0 Socket error ConnectionReset)'
>
Intestazioni del messaggio originale:
>
Received: from example.namprd11.prod.outlook.com (xxxx:yyyy:a03:b4::21)
by example.namprd11.prod.outlook.com (xxxx:yyyy:a03:f8::11) with
Microsoft SMTP Server (version=TLS1_2,
cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4608.15; Wed, 13 Oct
2021 03:11:53 +0000
ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none;
b=gFLBtnflhEUpfcen6fKp2gaxOH15Fvlxogi2kclBMYJhSNbjg95lT8QFRO+UUZC/zH7s+id+Hcxq6OqtHh9Y/RLLWqKjaOZ12xVK0/8vsac3r7sVyGG7sSoB4ZuWbjGGUmtk78zhY9QjdQPZVcTYaDEmDQbY8uhKBL+7duTLlpO3eZW5GvR86rEIoN8jUJp77d6QQR2trlyXqCSwEe59Hn+MS9/3jzFs0ky/tVEh1gUV9caMWh2BHYEn7lcMwMnoV6YHh/jENq31jHndrjS2Of7FICGbr0Eu6iicN2npwzY50sf8lGq6HAcXU9hMGvrOqy8Ci0t9M7zyVKN8PDyQsQ==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com;
s=arcselector9901;
h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1;
bh=4qNxxT0bvj1VwRu/5YxkBRshn152flq9Jpqxd++d/7Y=;
b=ivfoKOUYCIUSTkeZHGED+fnUfSkUZxAMpIqhKboodj+WWjHSv87bRkViKCWMTY4Fwhf4v/pdU93SKhqggMuK+mgLSR4o0sTfpmfW2ntTfPpvoqOp3c/+e4Ds6jrocfUscgiVY2A/8n/+3SQMKpbuBr/q447+csvoDpBHLyXiLUMAVp+AG59SQTdWJGWxetrVETG1aKgWtUZrbxjxAHyPFx3KfcWEyTmTgNALw7erzZ+dWF/vBE1VMY1ba0ENqw+LQhuDX8j3n80BNqfEcA4MIH81sWh6b0psOT9vOKoVbd+QLo94mG0rQt99VuFWO1aJBbTH4VcazRP4AQ3+bGlmAg==
ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass
smtp.mailfrom=example.com; dmarc=pass action=none header.from=example.com;
dkim=pass header.d=example.com; arc=none
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=example.onmicrosoft.com; s=selector2-example-onmicrosoft-com;
h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;
bh=4qNxxT0bvj1VwRu/5YxkBRshn152flq9Jpqxd++d/7Y=;
b=NBC4nesUgwixI6/lOOi5caFpky+N4yWxq3k2BuhAZB/gYgZK4nzm/jxQn8Enr1V8h7RF50rCiZPUqTdifblfZkUg5TNttyHGmxO5fjn5vYFLoyP2qWHxGHf1p5j2VhRqzqdHmiGu50J2yWnQCn/XT4pkQT30jqEj2wiFVGRreoM=
Received: from example2.namprd11.prod.outlook.com (xxxx:yyyy:a03:2ad::14)
by example.namprd11.prod.outlook.com (xxxx:yyyy:a03:b4::21) with
Microsoft SMTP Server (version=TLS1_2,
cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4587.18; Tue, 12 Oct
2021 16:27:30 +0000
Received: from example2.namprd11.prod.outlook.com
([xxxx::yyyy:82ac:bef9:609c]) by example2.namprd11.prod.outlook.com
([xxxx::yyyy:82ac:bef9:609c%6]) with mapi id 15.20.4587.026; Tue, 12 Oct 2021
16:27:30 +0000
From: First Last <fname@example.com>
To: "reciepient@example.com" <reciepient@example.com>
CC: "xxx@example.com" <xxx@example.com>
Subject: oggetto email qui
Thread-Topic: oggetto email qui
Thread-Index: AQHXv4U3rrvQuLjuyE6Hw8DbZvWdCw==
Date: Tue, 12 Oct 2021 16:27:30 +0000
Message-ID: <example2943732845882FABC52E0D8B69@example2.namprd11.prod.outlook.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
suggested_attachment_session_id: 5ea385f1-0b28-519a-27de-5e0a4bfcfbb3
authentication-results: example.com; dkim=none (messaggio non firmato)
header.d=none;example.com; dmarc=none action=none
header.from=example.com;
x-ms-publictraffictype: Email
x-ms-office365-filtering-correlation-id: 330c48b5-7a5b-431d-b01c-08d98d9d2fe5
x-ms-traffictypediagnostic: example:|example:
x-ms-exchange-atpmessageproperties: SA|SL
x-microsoft-antispam-prvs: <exampleD172896FB93810003494D8B69@example.namprd11.prod.outlook.com>
x-ms-oob-tlc-oobclassifiers: OLM:9508;
x-ms-exchange-senderadcheck: 1
x-ms-exchange-antispam-relay: 0
x-microsoft-antispam: BCL:0;
x-microsoft-antispam-message-info: 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
x-forefront-antispam-report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:example2.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(366004)(66946007)(6506007)(166002)(91956017)(76116006)(508600001)(75432002)(786003)(4326008)(9686003)(66446008)(66556008)(64756008)(66476007)(55016002)(7696005)(316002)(38070700005)(8676002)(186003)(26005)(8936002)(52536014)(19627405001)(5660300002)(38100700002)(86362001)(296002)(33656002)(2906002)(71200400001)(122000001)(6916009);DIR:OUT;SFP:1102;
x-ms-exchange-antispam-messagedata-chunkcount: 1
x-ms-exchange-antispam-messagedata-0: =?iso-8859-1?Q?gJ2EZ4o/O+IwcrHtdwy+eIItkOsBd90FM0cgvTUHtv/kOytlmDbqY7KsuW?=
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x-ms-exchange-transport-forked: True
Content-Type: multipart/alternative;
boundary="_000_example2943732845882FABC52E0D8B69example2namp_"
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: example2.namprd11.prod.outlook.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 330c48b5-7a5b-431d-b01c-08d98d9d2fe5
X-MS-Exchange-CrossTenant-originalarrivaltime: 12 Oct 2021 16:27:30.1275
(UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 83b02c92-5f26-48ed-9e5b-6c2fca46a8e6
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: mTKWCj9EBHofj4J0cgEjuB21KbpmKX+qp+qEvRhJ9ypaYRVk01EVtlwhuaRTbIhhzZcRzHvUb9Xbq+45FlSOgQ==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: example
Return-Path: fname@example.com
X-OriginatorOrg: example.com
Ho anche sospettato parzialmente l’aggiornamento recente di postfix che ho applicato immediatamente, ma non sono riuscito a verificare che fosse la causa principale del problema. Un blocco aggressivo dello spam con il nuovo aggiornamento potrebbe essere un problema, ad esempio, ma come posso confermare che sia questo il caso?
Questo problema si verifica almeno dalla fine di settembre/inizio ottobre. Qualsiasi idea o suggerimento dalla comunità per aiutare a diagnosticare cosa potrebbe non andare bene sarebbe davvero utile.