Changing from field

Hello!

We have a site called bluegaz.se. We recently made this wordpress installation into a multisite and made bluegaz.se into a parent site/network site. We then added a new site, bluegaz.dk, as a child site.

I have copied the contact form on bluegaz.se to bluegaz.dk. I then only changed the “to”-field from [email protected] to [email protected]. I did the same change in the “from”-field. The email adress [email protected] works and is in use. However since I made this change, the contact form wont send. It says “an error occured, please try again later”.

Any idea what might be wrong here and what I can do to fix it?

Any help is very appreciated, thank you!

The page I need help with: [log in to see the link]