Foxmail failed to send mail when sending 552-5.7.0 Our system...

  

Sending when using foxmail to send mail failed, error message: 552-5.7.0 Our system detected an illegal attachment on your message. Please 552-5.7 .0 visit, everyone help me see what is going on? I uninstalled the software and reinstalled a foxmail. This is still the error message.

A. Literally, it seems to mean that an illegal attachment was found in the email. You can resend a regular simple email without an attachment and try it. If it can be sent successfully, it is the reason for the attachment.

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