doesn't seem to send. but it does. the out box never get cleared and i get error messages. I am using windodws 10

windows 10, eM client 6.0.23421.0 doesnt seem to send e-mails. the box remains full. get the following error message. however testing it seem to work fine. can send the log file if i knew how. i attached a png but dont see it attached any where

Hi Bruce,
could you take screenshots of the error messages? You should be able to upload images in the forum post.
Also copy the content of the Tools > Operations > Log tab here after the error occurs.

Best regards,
Olivia