My coworkers are receiving this email.

It seems to be legit but I think it could be phishing since it says "Thanks for contacting us" and we never tried to contact anyone at OpenProject.

What do you think?

Best regards,

Javier

Hello Javier, thank you for reporting this! We will have a look at it asap.
Kind regards
Matthias

Dear Javier,
Thanks for getting in touch. Luckily, this is no phishing email! I changed the confirmation email after subscribing to our Marketing Newsletter. This must have been extended to the Members registration form, which of course is not necessary. I am very sorry for the confusion.
I have already changed it now.
Thanks and all the best
Birthe

Thanks for confirmation