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EndAsyncProcessing:NotInDataMode

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I want to send email , but failed and show error messages :

Sending of the message failed. An error occurred while sending mail. The mail server responded: EndAsyncProcessing:NotInDataMode. Please check the message and try again.

There was an error when I tried to send an email. I tried downgrading the version and it worked. The current version I installed is the latest version 140xx.

I want to send email , but failed and show error messages : Sending of the message failed. An error occurred while sending mail. The mail server responded: EndAsyncProcessing:NotInDataMode. Please check the message and try again. There was an error when I tried to send an email. I tried downgrading the version and it worked. The current version I installed is the latest version 140xx.
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You could report it as a possible bug.

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