User reporting "gmail couldn't verify whether it accually came from torproject.org" message

Hi TPA, I'm passing along an issue that a user reported to me regarding our newsletter:

I receive your newsletter and thanks for that! Now Gmail puts a warning about spam or malware on the mail. I would like to know your opinion on that. Should I worry?

I link a pic to this mail to show you what it's all about!

(It's in danish - I'll translate it:) Be careful with this message. Gmail couldn't verify whether it actually came from torproject.org. Avoid clicking links, downloading files or answering this message with personal data!

What do you think of this?