Can someone help me solve this email error I get when I try to send email
> via KMail

I found :
Sending failed:
> Unknown error code 50
> The message content was not accepted.
> The server responded: "5.7.1 Message refused by BannedWord check. This
> email has been rejected. The email message was detected as spam."
> The message will stay in the 'outbox' folder until you either fix the
> problem (e.g. a broken address) or remove the message from the 'outbox'
> folder. The following transport protocol was used: