Blank popup when using qq mail


I am using a QQ mail service and eM Client APP on macOS.

Now when I am trying to send an email, there’s a blank popup come out.

I have to manually close the popup, before I could continue other operation.

Can anyone help to look into this?



Can you resize that window?

If you can, then close it and the next time you start a message, it should keep the same window setting.

Thanks, Gary, but the window can not be resized and I can not see any info in the window, is there any other way I can find more information?

The window title is “sent mail already uploaded by SMTP”