552 5.2.3 message exceeds local size limit là gì năm 2024
Users sending messages with attachments to recipients hosted in Exchange servers can end up receiving bounce mails due these attachments. Show
Our Support Engineers support hundreds of Exchange servers for web hosts, web designers and other online businesses. In these servers, we’ve seen huge attachments or unsupported attachments formats causing email error 552. The error message seen by the senders in the bounce mail in cases of huge attachment size limit would be error 552 – ‘5.3.4 Message size exceeds fixed maximum message size’. If the bounce happens due to the content of the attachment, the error message would be similar to error 552 – ‘5.7.0 Our system detected an illegal attachment on your message.’ What is email error 552 ‘5.3.4 Message size exceeds fixed maximum message size’Every mail server has custom settings for the size of mails users can send and receive through it. These limits can either be global or individual-account specific or both. To limit bandwidth usage, this email size limit is often restricted to a few MBs in most servers. If the email size exceeds that limit, it will be rejected by the mail server. Error 552 ‘5.3.4 Message size exceeds fixed maximum message size’ is an email error commonly seen in bounce messages that generate from recipients using Exchange mail server. In an Exchange server, there are mainly 4 settings for message size limitations:
If the message size in the email exceeds any of these limits that are allowed for a particular email user account, it will be rejected with this error 552 message. To resolve a valid email bouncing with error 552, these attachment limits have to be increased or adjusted appropriately. But before we get into the detailed steps on how to increase these limits to accept valid user mails with attachments, we’ll see how these message size limits are to be calculated. [ Worry no more about web or mail errors. Get an experienced Support Engineer to manage your servers for as low as $12.99/hour. ] How to determine the email message size limits?In Exchange mail servers, content conversion happens for mails. Exchange server converts an internet/MIME message to MAPI/Exchange format, and vice versa for transmission. After this content conversion process, the message size generally increases by about 30%. As a result, a message of 9 MB may fail to deliver to a server with size limit 10 MB. Also, the precedence of the message size limits has to be noted before changing the settings. The maximum allowable message size for a server should be set as the organizational limit. If the message is sent to or received to the server from a user on the Internet, this organizational limit will be applied to that mail. But for internal users who send mail to each other after successful authentication, the user mailbox limit takes precedence over all other size restrictions. So, for a server to accept messages from the internet with size around 15 MB, all the message limits should be set at 20 MB, considering the content conversion size. How to fix error 552 ‘5.3.4 Message size exceeds fixed maximum message size’ in Exchange serverTo accept mails of large sizes from valid senders, the message size settings have to be increased in the server. Here’s how to do it for each limit: 1. How to increase global message size settingsThe global default message size limit for Exchange Servers 2007 to 2010 is 10 MB. To change this value, the steps are:
This is the organizational setting and would be applicable to all mails sent and received from that server over the internet. Increase global message size limits in Exchange server 2. How to change message size limits for Receive connectorReceive connectors are the gateways through which all inbound messages are received to a mail server. The maximum message size limit for a mail that can be received on a receive connector can be set by:
Setting a limit on receive connector can further limit the message size based on the sender’s IP address or type. 3. How to change message size limits for Send connectorSend connectors are configured to change the email sending behavior in server. To change the maximum message size limit on send connectors, do these steps:
This limit is used to limit the size of outgoing mails from a server. [ Tired of repeated mail errors? Our Support Engineers can take care of your servers and support your customers 24/7. Click here to know more. ] 4. How to increase message size settings for individual mail accountsThe individual mailbox settings can be changed from Exchange Administration Center (EAC). Here’s how to do it:
User mailbox settings are usually set to limit or override the default global size of email messages sent between users within the same server. All these email settings should be verified one by one to ensure that mails to the recipients are delivered successfully without bouncing with the error 552 ‘5.3.4 Message size exceeds fixed maximum message size’. In short..552 email error due to message size limit can show up in other forms too, such as:
The message size and attachment size for messages should be set to appropriate limits, for successful mail delivery to happen. But its not advisable to increase the message size unnecessarily, as it will end up overloading the server. Other than editing the email limit settings, techniques such as email compression can also be used in specific cases. Also, straight-away making server setting changes is not recommended as it may tamper with its normal functioning. Email error debugging involves examining the server logs, checking the bounce message, identifying the error-generating server and cross-checking the server settings. If you’d like to know how to secure your mail server and prevent email bounce errors, we’d be happy to talk to you. |