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552 5.2.0 ESMTP server not available AUP#O-1450

552 5.2.0 ESMTP server not available AUP#O-1450

 

 Does anyone have any information about the above error code?

 

Thank!

Randy

1 REPLY
Community Manager

Re: 552 5.2.0 ESMTP server not available AUP#O-1450

@rbellcpa

 

From https://answers.microsoft.com/en-us/msoffice/forum/msoffice_outlook-mso_other-mso_2016/i-get-error-m...
A 552 email error is typically encountered when there is a problem related to an attachment in your email. Either it has exceeded the size limits of the remote server, or the file-type isn't allowed by the remote server. Some mail servers also seem to use this error code incorrectly when blocking a message due to triggering a filter such as a URL in the message being found in a domain black list. " 

 

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