Administrators • Re: my zimbra suddenly cannot send and receive mail

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Delivery has failed to these recipients or groups:xxxxx@gmail.comYour message wasn't delivered because the destination email system rejected your message for security or policy reasons. For example, the email address might only accept messages from certain senders, or it might not accept certain types of messages, like those larger than a specific size.Contact the recipient (by phone, for example) and work with them and their email admin to determine what policy or setting blocked your message and what you should do to make sure that future messages from you won't be rejected.For more information, see Status code 5.7.1.The following organization rejected your message: gmail-smtp-in.l.google.com.Diagnostic information for administrators:Generating server: mail.mydomain.comxxxxx@gmail.comgmail-smtp-in.l.google.comRemote server returned '554 5.7.1 <gmail-smtp-in.l.google.com #5.7.1 smtp; 550-5.7.1 [103.30.189.50 19] Gmail has detected that this message is likely 550-5.7.1 suspicious due to the very low reputation of the sending domain. To 550-5.7.1 best protect our users from spam, the message has been blocked. For 550-5.7.1 more information, go to 550 5.7.1 https://support.google.com/mail/answer/188131 41be03b00d2f7-842f9276eabsi2278579a12.661 - gsmtp>'Original message headers:Return-Path: <myemail@mydomain.com>Received: from localhost (localhost [127.0.0.1])by mail.mydomain.com (Postfix) with ESMTP id E2CC612003C;Thu,  2 Jan 2025 09:51:08 +0000 (UTC)Received: from mail.mydomain.com ([127.0.0.1]) by localhost (mail.mydomain.com [127.0.0.1]) (amavis, port 10032) with ESMTP id sr3vyceNqrEw; Thu,  2 Jan 2025 09:51:07 +0000 (UTC)Received: from localhost (localhost [127.0.0.1])by mail.mydomain.com (Postfix) with ESMTP id 7A113120044;Thu,  2 Jan 2025 09:51:07 +0000 (UTC)DKIM-Filter: OpenDKIM Filter v2.10.3 mail.mydomain.com 7A113120044DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mydomain.com;s=selector; t=1735811467;bh=525DemhVDQh+6U72BU5wsAZjNUNeh7mPl6beu+8QM/E=;h=From:To:Date:Message-ID:MIME-Version;b=sxzQ0gyqGiR3TduhxHd160iqN5CmkXXcLvlr/GMdnP85ujshL5aI1dZp71ButhxWc HuWkEjyjNRTlV8BKFQaTi1DcyMvtVWNl6ktcXKaqqxPLCFXNVQ6rOgjar4lK4BRICW j4t4DlgyoB0Mz9GZ5opnQM4FvkN+pm4rmdxY3q6I=X-Virus-Scanned: amavis at mydomain.comReceived: from mail.mydomain.com ([127.0.0.1]) by localhost (mail.mydomain.com [127.0.0.1]) (amavis, port 10026) with ESMTP id XKBi-DmsDKK6; Thu,  2 Jan 2025 09:51:07 +0000 (UTC)Received: from TYZPR02MB8159.apcprd02.prod.outlook.com (unknown [40.99.94.109])by mail.mydomain.com (Postfix) with ESMTPSA id E66B012003C;Thu,  2 Jan 2025 09:51:06 +0000 (UTC)From: "myemail@mydomain.com" <myemail@mydomain.com>To: "myemail@yourdomain.com" <myemail@yourdomain.com>,"xxxxx@gmail.com" <xxxxx@gmail.com>Subject: sending email at 16:50Thread-Topic: sending email at 16:50Thread-Index: AQHbXPvCBznDOoUyTUiHpMbPY4oEKA==X-MS-Exchange-MessageSentRepresentingType: 1Date: Thu, 2 Jan 2025 09:50:30 +0000Message-ID: <TYZPR02MB8159F1CE526F5238901DDA8FA7142@TYZPR02MB8159.apcprd02.prod.outlook.com>Accept-Language: en-USContent-Language: en-USX-MS-Has-Attach:X-MS-Exchange-Organization-SCL: -1X-MS-TNEF-Correlator:X-MS-Exchange-Organization-RecordReviewCfmType: 0msip_labels:Content-Type: multipart/alternative;boundary="_000_TYZPR02MB8159F1CE526F5238901DDA8FA7142TYZPR02MB8159apcp_"MIME-Version: 1.0