550 5 7 1 this message does not meet ipv6 sending guidelines for storing

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In addition, I send mail from the sites stored on the server does not reply. , AM #5 , PM #7 . that this message does\n not meet IPv6 sending guidelines regarding PTR records. that this message does not meet IPv6 sending guidelines regarding PTR A few days ago (Sep 7) i updatet my system an the ispconfig. . of the file, see the master(5) manual page (command: "man 5 master"). # . flags=R user= scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop}. 5 days ago When an email message is sent from a Plesk server to a Gmail account, it fails to message does not meet IPv6 sending guidelines.

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This includes providing links to other websites, whether deemed competitive to this website or not. Some links, however, are welcome to the site and you are allowed to establish hyperlink to appropriate part within the site provided that: This error occurs when the size of the message that was sent by the sender exceeds the maximum allowed message size when passing through a transport component or mailbox database.

The sender must reduce the size of the message for the message to be successfully delivered. For more information about how to configure message size limits, see Message size limits. Check the configuration of the server's connectors for loops, and ensure that each connector is defined by a unique incoming port. If there are multiple virtual servers, ensure that none are set to "All Unassigned. Check that the domain name specified is valid and that a mail exchanger MX record exists.

By default, after 20 iterations of an email loop, Exchange interrupts the loop and generates an NDR to the sender of the message. This error occurs when the delivery of a message generates another message in response. That message then generates a third message, and the process is repeated, creating a loop. Mail loops are typically created because of a configuration error on the sending mail server, the receiving mail server, or both. Check the sender's and the recipient's mailbox rules configuration to determine whether automatic message forwarding is enabled.

It is possible that this error can also occur when the system disk is full. This error occurs when the sender has included too many recipients on the message. The sender must reduce the number of recipient addresses in the message or the maximum number of recipients must be increased to allow the message to be successfully delivered.

One possible cause is that the recipient address format might contain characters that are not conforming to Internet standards. Check the recipient's address for nonstandard characters. Check Event Log for possible failures. This error occurs when the sender tries to send a message to a recipient but the sender is not authorized to do this.

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This frequently occurs when a sender tries to send messages to a distribution group that has been configured to accept messages only from members of that distribution group or other authorized senders.

The sender must request permission to send messages to the recipient. This error can also occur if an Exchange transport rule rejects a message because the message matched conditions that are configured on the transport rule.

This error occurs when the sending email system tries to send an anonymous message to a receiving email system, and the receiving email system does not accept messages for the domain or domains specified in one or more of the recipients. The following are the most common reasons for this error: A third party tries to use a receiving email system to send spam, and the receiving email system rejects the attempt.

By the nature of spam, the sender's email address might have been forged, and the resulting NDR could have been sent to the unsuspecting sender's email address. It is difficult to avoid this situation. An MX record for a domain points to a receiving email system where that domain is not accepted. The administrator responsible for the specific domain name must correct the MX record or configure the receiving email system to accept messages sent to that domain, or both.

A sending email system or client that should use the receiving email system to relay messages does not have the correct permissions to do this. The receiving email system requires authentication before message submission.

This error occurs when the receiving server must be authenticated before message submission, and the sending email system has not authenticated with the receiving email system. The sending email system administrator must configure the sending email system to authenticate with the receiving email system for delivery to be successful.

This error can also occur if you try to accept anonymous messages from the Internet on a Mailbox server that has not been configured to do this. Information that is displayed in an NDR is separated into the following two areas: A user information section A administrator information section The information in each section is targeted to the readers of that section. The user information section appears first and contains feedback to help the user understand in nontechnical terms why the delivery of the message failed.

The Diagnostic information for administrators section provides deeper technical information, such as the original message headers, which help email administrators troubleshoot a delivery issue. The following figure shows the user information section and Diagnostic information for administrators section of an NDR.

NDR Sections User information section The user information section of an NDR generated by Exchange contains information that you want to communicate to an end user who has sent a message that is later returned with an NDR. The text that is displayed in this section is inserted by the Exchange server that generated the NDR.

The text in the user information section is designed to help end users determine why the message was rejected and how to resend the message successfully if the message should be resent. When applicable, the fully qualified domain name FQDN of the server that rejected the message is included in the user information section. If delivery fails to more than one recipient, the email address of each recipient is listed and the reason for the failure is included in the space below the recipient's email address.

You can modify the text in the user information section by using the New-SystemMessage cmdlet. By creating a custom message, you can provide specific information to end users, such as a telephone number to use to contact the helpdesk department or a hyperlink to use to obtain self-service support. Return to top Diagnostic information for administrators The Diagnostic information for administrators section contains more detailed information about the specific error that occurred during delivery of the message, the server that generated the NDR, and the server that rejected the message.

The generating server takes the enhanced status code that is explained later in this topic. This code creates an easy-to-read NDR. If no remote server is listed below the email address of the sender in the Diagnostic information for administrators section, the generating server is also the server that rejected the original email message.

If message delivery fails when the message is sent to another recipient in the Exchange organization, the same server typically rejects the original message and generates the NDR. If delivery to more than one recipient has failed, the email address for each recipient is listed. The rejected recipient field also contains the following subfields for each email address listed: The remote server field is only populated when delivery has been attempted to a remote server, and that delivery attempt has been rejected before the receiving server successfully acknowledges the message after the message body is sent.

Guide To Configuring VirtualMin To Send & Receive Email

If the original message is successfully acknowledged by the receiving server and is then rejected because of content restrictions, for example, the remote server field is not populated. The enhanced status code indicates why the original message was rejected. The enhanced status code is not rewritten by Exchange but is used to determine what text to display in the user information section.

  • DSNs and NDRs in Exchange 2013

The enhanced status codes you're most likely to encounter are listed in "Common Enhanced Status Codes" later in this topic. The SMTP response typically contains a short string that provides an explanation of the enhanced status code that is also returned. These headers can provide useful diagnostic information, such as information that can help you determine the path that the message took before it was rejected or whether the To field matches the email address that is specified in the rejected recipient field.

Return to top The following sections provide examples of two ways that NDR messages can be generated: By the same server By different servers NDR generated and original message rejected by the same server The following example shows what happens when a remote email organization accepts delivery of an email message through an Edge Transport server, and then rejects that message because of a policy restriction on the recipient's mailbox.

In this case, the sender is not allowed to send messages to the recipient.

DSNs and NDRs in Exchange Exchange Help | Microsoft Docs

Edge Transport servers do not perform message size validation so the Edge Transport server in this example accepts the message because it has a valid recipient address and the message does not violate another content restrictions. Because the remote email organization accepts the whole message, including the message contents, the remote email organization is responsible for rejecting the message and for generating the NDR message to be sent to the sender.

NDR generated and message rejected by the same server Also, messages that are rejected when they are sent to recipients that are part of the same Exchange organization are typically rejected by the same email server that generates the NDR message.

Messages sent to local recipients can be rejected for various reasons, such as mailboxes that have exceeded their quota, lack of authorization to send messages to the recipient address, or hardware failures that result in an extended loss of connectivity to other servers in the organization.

In both situations, no remote server is included under the email address of the recipients listed in the NDR message. Return to top NDR generated and original message rejected by different servers The following example shows what happens when a remote email organization rejects delivery of an email message before it ever accepts the message.

In this example, the remote server rejects the message and returns an enhanced status code to the local sending server because the specified recipient does not exist.