help!

[David Møller]

what does this mean please?

Du har allerede afsendt denne besked! Du må ved en fejltagelse have dobbeltklikket, eller prøvet at opdatere.

(I am tring to send a post with an attachment and get this message).

I feel like a  failed Viking!

mvh

[Marianne Jensen]

It means:

You already sent this message once.
(by mistake you might have double-clicked or pressed F5)

Kind regards
Marianne

[Jørgen Sørensen]

You can use google

Oversættelse fra Dansk til Engelsk, and 59 other languages

google oversæt
Du har allerede afsendt denne besked! Du må ved en fejltagelse have dobbeltklikket, eller prøvet at opdatere.

google translate
You have already sent this message! You may accidentally have double-clicked, or tried to update.