Exchange Smtp Error Codes
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reply codesSometimes your SMTP server may return a particular error message. The problem is that it will generally be very cryptic, like "550 Requested action not taken: mailbox unavailable" or "421 Try again later". What does these smtp server error codes numbers mean?First of all: not any reply code is an error. Sometimes it's just smtp error codes 554 a response containing a detail about the server or an answer to a command. Secondly: any code consist of three digits, and smtp error codes and acknowledgements each conveys a particular information. The first one defines whether the server has accepted the command, fulfilled an action, run into a temporary issue, encountered an error etc; the second and the third one refine the smtp error codes wikipedia description further, stating if there's been a syntactic problem, or a connection trouble etc.Unfortunately, different servers sometimes use these codes in a different way, making the whole thing even more complicated... Anyhow, the most critical series of error messages is the 5xx one, and especially the ones from 550 to 559. In particular, you will probably get a lot of 550 SMTP error codes – that is, a problem that concerns the
Smtp Error Codes Rfc
recipient's email address.Finally, remember that it's much easier to deal with these error codes if you choose to rely on a professional SMTP server that will help you solve any issue. turboSMTP, for instance, comes with a 24/7 customer support: you can try it free and forget once for all these issues.And here's a list of the main SMTP error or reply messages, with an explanation and a tip about what to do. CODEMEANINGHOW TO SOLVE IT / WHAT TO DO101The server is unable to connect.Try to change the server's name (maybe it was spelt incorrectly) or the connection port.111Connection refused or inability to open an SMTP stream.This error normally refers to a connection issue with the remote SMTP server, depending on firewalls or misspelled domains. Double-check all the configurations and in case ask your provider.211System status message or help reply.It comes with more information about the server.214A response to the HELP command.It contains information about your particular server, normally pointing to a FAQ page.220The server is ready.It's just a welcome message. Just read it and be happy that everything is working (so far)!221The server is closing its transmission channel. It can come with side messages like "Goodbye" or "Closing connection".The mailing session is going to end, which simply means that all messages have
Sub-Codes Registration Procedure(s) Specification Required Expert(s) Chris Newman Reference [RFC5248] Available Formats CSV Code Summary Description Reference Submitter Change Controller 2.XXX.YYY Success Success specifies that the DSN is reporting
Smtp Error Codes 550
a positive delivery action. Detail sub-codes may provide notification of transformations mimecast smtp error codes required for delivery. [RFC3463] (Standards track) G. Vaudreuil IESG 4.XXX.YYY Persistent Transient Failure A persistent transient failure is list of smtp error codes one in which the message as sent is valid, but persistence of some temporary condition has caused abandonment or delay of attempts to send the message. If this code http://www.serversmtp.com/en/smtp-error accompanies a delivery failure report, sending in the future may be successful. [RFC3463] (Standards track) G. Vaudreuil IESG 5.XXX.YYY Permanent Failure A permanent failure is one which is not likely to be resolved by resending the message in the current form. Some change to the message or the destination must be made for successful delivery. [RFC3463] (Standards track) G. http://www.iana.org/assignments/smtp-enhanced-status-codes/smtp-enhanced-status-codes.xhtml Vaudreuil IESG Subject Sub-Codes Registration Procedure(s) Specification Required Expert(s) Chris Newman Reference [RFC5248] Available Formats CSV Code Summary Description Reference Submitter Change Controller X.0.YYY Other or Undefined Status There is no additional subject information available. [RFC3463] (Standards track) G. Vaudreuil IESG X.1.YYY Addressing Status The address status reports on the originator or destination address. It may include address syntax or validity. These errors can generally be corrected by the sender and retried. [RFC3463] (Standards track) G. Vaudreuil IESG X.2.YYY Mailbox Status Mailbox status indicates that something having to do with the mailbox has caused this DSN. Mailbox issues are assumed to be under the general control of the recipient. [RFC3463] (Standards track) G. Vaudreuil IESG X.3.YYY Mail System Status Mail system status indicates that something having to do with the destination system has caused this DSN. System issues are assumed to be under the general control of the destination system administrator. [RFC3463] (Standards track) G. Vaudreuil IESG X.4.YYY Network and Routing Status The networking or routing codes report status about the delivery system itself
for error code 4.4.7 in Office 365 Applies To: Outlook 2016, Outlook 2013, Office 365 Admin, Outlook 2010, Outlook 2007, Less Applies To: Outlook 2016 , Outlook 2013 , Office 365 Admin , Outlook 2010 , Outlook 2007 , More... Which version do I have? https://support.office.com/en-us/article/Fix-email-delivery-issues-for-error-code-4-4-7-in-Office-365-2fda59a8-84f8-4eb0-96e1-49187fbe7ff9 More... This topic can help you fix email problems that are associated with error code http://www.coldnet.net/tech/smtpcodes.htm 550 4.4.7 if you see this in a non-delivery report (NDR). Mail flow problems can be frustrating, but we have solutions you can try in order to get your message sent. There can be several causes for dsn error code 4.4.7, so use the information in the NDR to decide how to fix the problem. For more details about the error codes causes, see Causes for 4.4.7, later in this topic. I sent a message, what can I do to fix this? I'm the Admin, what can I do to fix this? Why did I get a non-delivery report? I sent a message and got error code 4.4.7 in an NDR. What can I do to fix this?   Here are some procedures that you can try that might allow you to resend the message successfully. Message delivery from smtp error codes server-to-server can be complicated or require special access to settings, so most of these steps are designed for an Office 365 email administrator and not the average email sender. If the steps here don’t help, contact your email administrator and refer them to this information so they can try to resolve the issue for you. Problems in the destination domain If you get DSN error code 4.4.7 and have problems sending email to recipients in one domain only, the problem is likely with that destination domain. A domain is similar to an organization name or the name of an email provider and in an email address it shows up on the right-hand side of the at symbol (@). For example, in Harumi@contoso.com contoso.com is the domain name. Learn more about domains at What are domain names? Possible causes for domain issues include: Temporary network or Internet connection issues in the destination domain. Aggressive anti-spam settings in the destination domain that block legitimate senders, for example, all senders from any domain in Exchange Online. If you suspect the problem is with the destination domain, let the administrators of that domain know. You need to provide the following information, which is all contained in the NDR: The name of the mail server in the destination domain, and the error message returned by the mail server. The
that the delivery directory on the Virtual server has exceeded its limit. (Default 22 MB) 4.3.1 Not enough disk space on the delivery server. Microsoft say this NDR maybe reported as out-of-memory error. 4.3.2 Classic temporary problem, the Administrator has frozen the queue. 4.4.1 Intermittent network connection. The server has not yet responded. Classic temporary problem. If it persists, you will also a 5.4.x status code error. 4.4.2 The server started to deliver the message but then the connection was broken. 4.4.6 Too many hops. Most likely, the message is looping. 4.4.7 Problem with a timeout. Check receiving server connectors. 4.4.9 A DNS problem. Check your smart host setting on the SMTP connector. For example, check correct SMTP format. Also, use square brackets in the IP address [197.89.1.4] You can get this same NDR error if you have been deleting routing groups. 4.6.5 Multi-language situation. Your server does not have the correct language code page installed. 5.0.0 SMTP 500 reply code means an unrecognised command. You get this NDR when you make a typing mistake when you manually try to send email via telnet. More likely, a routing group error, no routing connector, or no suitable address space in the connector. (Try adding * in the address space) This status code is a general error message in Exchange 2000. In fact Microsoft introduced a service pack to make sure now get a more specific code. 5.1.x Problem with email address. 5.1.0 Often seen with contacts. Check the recipient address. 5.1.1 Another problem with the recipient address. Possibly the user was moved to another server in Active Directory. Maybe an Outlook client replied to a message while offline. 5.1.2 SMTP; 550 Host unknown. An error is triggered when the host name can’t be found. For example, when trying to send an email to bob@ nonexistantdomain.com. [Example kindly sent in by Paul T.] 5.1.3 Another problem with contacts. Address field maybe empty. Check the address information. 5.1.4 Two objects have the same address, which confuses the categorizer. 5.1.5 Destination mailbox address invalid. 5.1.6 Problem with homeMDB or msExchHomeServerName - check how many users are affected. Sometimes running RUS (Recipient Update Service) cures this problem. Mailbox may have moved. 5.1.7 Problem with senders mail attribute, check properties sheet in ADUC. 5.2.x NDR caused by a problem with the large size of the email. 5.2.1 The message is too large. Else it could be a permissions problem. Check the recipient's mailbox. 5.2.2 Sadly, the recipient has exceeded their mailbox limit. 5.2.3 Recipient cannot receive messages this big. Server or connector limit exceeded. 5.2.