Blank email messages not sending

[John_]

I have tried to send a blank email message to myself via BT webmail and this message popped up:  

"Sorry your email could not be delivered due to content policy reasons. Please check your message content for URLs, content and subject matter that could be construed as Malware, Spam or Phishing before retrying. (6-1-1-1) ID (6A08C1FD01B1705C)"

There was no content in the message. It was blank. Only the subject line had text "Test from web email"

I've notice over the last few days when using a client (Outlook 2016 in my case)  message show as sent on the application but not on webmail.  This has caused me some grief, in thinking folk had received emails but they ahd disappeared. 

Help and advice welcome.    BT email regularly lets me down!! 

[Michael_D]

Hi @John_ 

Thanks for coming to the community.

If you are seeing that error, it will be that it is being picked up by our spam filters, perhaps with it being a blank email other than the title, and the title being in that way.

If you try to send yourself an email with more in the title and content in the body of the message does it send?

With regards to your Outlook 2016 client, if you send emails in webmail do they send?

Michael