False error detection on outgoing emails

[alderc]

 Trying to reply to an email and getting: 

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. (6-1-3-1) ID (699516090161C290

There is nothing untoward in the reply, just short text. This is an URGENT problem. What's the fix?

[gg30340 · Accepted solution]

If you are using the Reply To function try sending a new fresh email and enter the address manually.

[alderc]

That might enable me to send an email to the recipient, but it doesn't keep the conversation going, so isn't solution.

[gg30340]

It was given as a possible fix/help with your URGENT problem.

For a more permanent fix call BT email team on 0330.1234.150.