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email error exchange


How to fix email error 552 – ‘5.3.4 Message size exceeds fixed maximum message size’ in Exchange servers

How to fix email error 552 – ‘5.3.4 Message size exceeds fixed maximum message size’ in Exchange servers

Users sending messages with attachments to recipients hosted in Exchange servers can end up receiving bounce mails due these attachments.

Our Hosting 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.

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How to fix ‘571 Delivery not authorized message refused’ error in Exchange server

How to fix ‘571 Delivery not authorized message refused’ error in Exchange server

At times, when you send mails to a certain recipient address, it may fail to deliver, giving the following error message:

An error occurred while trying to deliver this message to the recipient's e-mail address.
 Diagnostic information for administrators:

Remote Server returned Requested #571 Delivery not authorized message refused

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